Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ceec9f50bfec4f6…

MALICIOUS

PDF

78.5 KB Created: 2021-04-01 14:04:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 179d9b9357d6f7a3014aceff013931bc SHA-1: 83722634600add6786c286109cda6463b946beff SHA-256: 1ceec9f50bfec4f6538d93b9727958dafa480268f1fc2db53a979d631bcd00b1
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM'. This suggests the document's primary purpose is to redirect users to other sites, potentially for malicious purposes such as phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/award?keyword=dental+anatomy+handbook+pdf PDF link annotation
    • https://vaxatimiroxak.weebly.com/uploads/1/3/4/6/134617636/8354556.pdfIn PDF document text
    • http://granitmetrospecstroy.ru/sec_financial_reporting_manualki86u.pdfIn PDF document text
    • http://tixshopclub.fun/watch_dogs_bad_blood_trophy_guidewymu7.pdfIn PDF document text
    • http://yourcy.com/5075501632102klo.pdfIn PDF document text
    • http://swast-group.website/phonetics_and_phonology_test_with_ankenhw.pdfIn PDF document text
    • https://fokinovev.weebly.com/uploads/1/3/0/7/130775288/fc67b7d420.pdfIn PDF document text
    • http://povar2020.site/gegajowojzbiji.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/nasb_macarthur_study_bible_2nd_edition_premium_goatskin_leather.pdfIn PDF document text
    • http://kifopelidito.mypressonline.com/20911227016.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://74bb8966-1fc2-43cb-a641-24c20f380d28.filesusr.com/ugd/84c7b5_470ab89b8bfd488dabd21ee1d2ac15e3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f1b6357-fc29-46b8-b7b4-9e21632f044d/59146927981.pdfIn PDF document text
    • https://a24bc4ef-4ee2-4fae-af0c-c9fea810b245.filesusr.com/ugd/67d96c_c839d04753e741a6b9445b80cfe55bba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/764a325d-7473-4bff-b1ed-66218574eb77/33395717480.pdfIn PDF document text
    • https://434dcbc4-7bd9-40fe-99bf-e102daebf961.filesusr.com/ugd/07ef24_3541f7024ac34fdc8150ae4422e8f15d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bepukuba/muvixofamebagow.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/93368220486.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/what_should_a_compare_and_contrast_essay_provide_brainly.pdfIn PDF document text
    • https://d5fd0048-bb8d-45a1-ba21-28d1cb0b7162.filesusr.com/ugd/5e8de6_b376a8fdda6d429b9c6cffb63e5a14d9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/93e025cb-9e7a-4f2c-8d00-1aff28f89f7d/why_is_my_us_ds_light_blinking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53548724-827e-416d-bf47-a9c9a2e7c56b/the_new_encyclopedia_of_modern_bodybuilding_ebook.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_d1f7f399dc74421bb2b525f6188c87d7.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65A 5052 bytes
SHA-256: ede3bc66003f64d0c5eeb412c1f76efb29035aac6ab5055746db583274cece4d
font_01_sfnt_off0000f76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76C 11540 bytes
SHA-256: ab4fca77a0d9339e4498f9eb7ffcba2e8aa047923a1083966f398589c75a543d
font_02_sfnt_off00011ed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED8 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c