Malicious PDF — malware analysis report

Static analysis result for SHA-256 db4f5a3ee26a4dd7…

MALICIOUS

PDF

78.1 KB Created: 2021-02-26 07:41:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e150642a18eab97ec1a690470a0e886b SHA-1: 9a0ab84455a7565dec7ef6783b5955bc86ad2a80 SHA-256: db4f5a3ee26a4dd70c90de346ab21022abaff62dfb96f08efc5ff1a3f666abd0
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 0.9998

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://crophysi.ru/strik?utm_term=best+french+english+dictionary+app+offline PDF link annotation
    • https://lirodenagegoket.weebly.com/uploads/1/3/1/4/131437677/rajabum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380090/normal_5fce88c773571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385437/normal_5fe81f58e4000.pdfIn PDF document text
    • http://nigasheff.xyz/larry_david_net_worth_20189z66b.pdfIn PDF document text
    • https://segalupozido.weebly.com/uploads/1/3/0/7/130738693/nevagexukogi-bekuda-wujapa.pdfIn PDF document text
    • http://cocobuka3.xyz/62338816307ul7rf.pdfIn PDF document text
    • https://bipewajebij.weebly.com/uploads/1/3/2/7/132740639/8084630.pdfIn PDF document text
    • https://kexulisil.weebly.com/uploads/1/3/4/7/134762119/6747846.pdfIn PDF document text
    • https://cdn.sqhk.co/puburikob/7Uhjjel/sosojubozep.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/sfiaiib/17186219182.pdfIn PDF document text
    • https://penuwepilaxol.weebly.com/uploads/1/3/4/7/134756509/zowobupenul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446027/normal_5fd7b6bf7647d.pdfIn PDF document text
    • http://wamuterireted.iblogger.org/add_opacity_to_background_image_android.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
    • http://kaxozofevaz.epizy.com/24608794183.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/rasopavenewizonobi.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/can_a_catholic_be_king.pdfIn PDF document text
    • http://zaxutakizet.epizy.com/tinoxulavomuf.pdfIn PDF document text
    • http://pazoluno.epizy.com/11448699156.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/57208702458.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/dasunifiwomatepipukaj.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE500 5356 bytes
SHA-256: af8b7cc763dcc8ee23f2ddd5c1140c0943a99ba1fd2c7ef4da85ab102f32ddfe
font_01_sfnt_off0000f72c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72C 11100 bytes
SHA-256: 17708af06a97e6a8d52db015a250affe153c2114cc243c03534ca29d54f0c30a
font_02_sfnt_off00011cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CDF 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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