Malicious PDF — malware analysis report

Static analysis result for SHA-256 dab7084c88e6328c…

MALICIOUS

PDF

80.4 KB Created: 2021-05-07 16:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 234f45d9ffc24878e8d10c09dbde452b SHA-1: 9fed20869ee34ca5828143c460ba6760028dc5c4 SHA-256: dab7084c88e6328c05e81035cd0f2bf429e1882ca660ffcbae8abaafe9ac5592
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 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.
  • 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://zajinet.ru/strik?utm_term=wagner+power+painter+plus PDF link annotation
    • http://skidki-day.store/human_trafficking_definition_united_nations5ydtb.pdfIn PDF document text
    • http://rozel.ru/98860438906ojv7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454425/normal_60190aedd81a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473432/normal_6030626cd5d2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466680/normal_5fe8d0e162985.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483870/normal_60383db313c60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367921/normal_605bf0f8b0771.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dagasopones/30830460826.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/77092508649.pdfIn PDF document text
    • https://d67926d6-99fe-48a4-938f-95006fdf2de6.filesusr.com/ugd/21d82e_be2e7826e3b749dcb22cf59294d69bc8.pdf?index=trueIn PDF document text
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_ab42b28e4a87492984e882355506e96f.pdf?index=trueIn PDF document text
    • https://0aed7b51-d02b-4864-a6bb-b478bb809667.filesusr.com/ugd/fbdaab_542b0fcabf894b53a7216546a027e435.pdf?index=trueIn PDF document text
    • https://d190c387-1498-4382-a59e-98d1a0a9794c.filesusr.com/ugd/a91264_11eb6ae27d8f4c37b36ad6517bec153c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/what_is_fsi_engine.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/48471196440.pdfIn PDF document text
    • https://d064ede3-316f-4d13-8ec5-014b2136b3bd.filesusr.com/ugd/154db6_c5807ea7da9646c48d67148531a6336b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/57558818402.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/remove_google_search_bar_home_screen_android_one.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/35729849778.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/rei_wilderness_first_aid_class_review.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e79e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79E 5092 bytes
SHA-256: ad9933090ed0b7d541d3eadc2bdd7a2d8fbb5ad6a04f6ab4c1fe6a1ed6b9534a
font_01_sfnt_off0000f91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91B 11416 bytes
SHA-256: c4fa12058457707a94eed4b1f0628ae30043f47a097df03e6979e5823aa4ab14
font_02_sfnt_off0001201a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201A 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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