Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c91faedd93e1c1a…

MALICIOUS

PDF

112.3 KB Created: 2021-03-27 22:25:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 260f11e25c7fccab1755ac7559429620 SHA-1: 533f7e13145002d9c530d88f400bede19b5b413e SHA-256: 0c91faedd93e1c1a608d1bb32455188b12e841aaabc5498a558a5c38e3bec660
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9532

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://botokaw.ru/award?keyword=streaming+media+definition+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4382770/normal_6006f60e37819.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497370/normal_605f7f48b375e.pdfIn PDF document text
    • https://cdn.sqhk.co/togixulala/Nhcdkkk/22706412035.pdfIn PDF document text
    • https://jorosovepi.weebly.com/uploads/1/3/4/7/134706332/3881460.pdfIn PDF document text
    • https://cdn.sqhk.co/juvanejejuwo/evhbhdK/pejoguzar.pdfIn PDF document text
    • https://dagevonedil.weebly.com/uploads/1/3/4/7/134736192/gezovamepadeb-mogozufeka.pdfIn PDF document text
    • https://wopuwidutava.weebly.com/uploads/1/3/5/3/135322166/wowimeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478402/normal_5fece57ad4b2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421787/normal_60587946a94fa.pdfIn PDF document text
    • https://cdn.sqhk.co/nizaveni/igjfwhf/xomukamapurozotovuxuxoni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_6017d60fe2a77.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zekezixurul.onlinewebshop.net/cartesian_plane_lesson_plan.pdfIn PDF document text
    • http://namezenidel.onlinewebshop.net/writing_skills_download.pdfIn PDF document text
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_88ae6fd8c59045589d8041d3fa86ef0e.pdf?index=trueIn PDF document text
    • http://jafixomedimun.onlinewebshop.net/energy_environment_ecology_and_society.pdfIn PDF document text
    • http://tiwosutodegadax.onlinewebshop.net/49534182094.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/graphing_rational_functions_answer_sheet.pdfIn PDF document text
    • https://fc06435f-e709-4c80-b59d-96fa470c1a13.filesusr.com/ugd/bdc04d_f34d7a4be5ce46658225e2df411cef8a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/cercles_de_la_forme_beaubourg_planning.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/14542730878.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/narasimha_movie_dialogues.pdfIn PDF document text
    • http://bigapenegig.atwebpages.com/charcoal_production.pdfIn PDF document text
    • https://645c32c3-7e99-4959-b93b-7980205539d7.filesusr.com/ugd/30a31c_27a61e1bca684707a734ccd54f843c00.pdf?index=trueIn PDF document text
    • https://234d5d8d-19c9-4cab-a884-dd0775662658.filesusr.com/ugd/fb7225_5f192415e8154691bf566e482c4d5402.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/corningware_percolator_top.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 10

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off000178a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x178A5 18176 bytes
SHA-256: b22710da0d81dd36a81e8e78bcecf4ea7c2753a5b0ec201b4feebcf02f812944
font_00_sfnt_off0000f2b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B7 5684 bytes
SHA-256: 721cc2fdd3dc595dcb3ceb283710897e6e3f946895107a6db3eba0a731c1121f
font_01_sfnt_off00010694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10694 5040 bytes
SHA-256: 650a6933876bc124440a15db497f65bf782abbbce44455414e49a773fcbb4a39
font_02_sfnt_off00011792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11792 2656 bytes
SHA-256: ff8289fcab20b7b81f5dc7c47458689637225d7099c48932a46d6898d6123f6c
font_03_sfnt_off00012299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12299 2328 bytes
SHA-256: 18b250f24057ce91e4a59b25c1eec79fa8b4d7e2cb9f6c0de02c7e032a072fd4
font_04_sfnt_off00012d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4E 2108 bytes
SHA-256: 5fc9e2cd4e7ad04544edda2023dd698132b65daf167a61e09de9fd8de66d8b52
font_05_sfnt_off00013719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13719 6640 bytes
SHA-256: 593a452f0795506ac97007ad32b21767cc543cb1bc716fd74108abb5279d52e6
font_06_sfnt_off000148b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148B7 16004 bytes
SHA-256: 3fac272c0b466c986edfaea77f48bb1fc3a248e03a4052c9257b24f7a07d5c68
font_08_sfnt_off00019536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19536 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
font_09_sfnt_off0001a340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A340 3276 bytes
SHA-256: 36e71c95d3b6602ce175a98ac99a2c18c99235fab0e24c6c46ec4ff9e72f8c94

Open this report in the interactive analyzer, or submit your own file for analysis.