Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d96974e8220749…

MALICIOUS

PDF

74.2 KB Created: 2021-03-23 00:31:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 053405a650041effda42581e282c3a2d SHA-1: 1defaadc608dbdd53048e0542bc1a91db3b52683 SHA-256: d0d96974e822074930e55038fd7c10ee459bf5ae8d0eb73be81b5f2a65bf9a0a
164 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are SEO-themed, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards a phishing or malicious content distribution scheme, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/award?keyword=athlean+x+workout+plan+pdf+download
    • https://wezalowesugalu.weebly.com/uploads/1/3/2/8/132815960/1243396.pdf
    • http://palejep.22web.org/glenshee_mountain_snow_report.pdf
    • https://dorubirema.weebly.com/uploads/1/3/4/3/134317311/warebiwiligo.pdf
    • https://kijemaroxajum.weebly.com/uploads/1/3/5/3/135397629/vanurosamuzupib.pdf
    • https://kekisuganuzab.weebly.com/uploads/1/3/4/7/134721312/bb5598a4c.pdf
    • http://nafotasu.22web.org/vodobemosidifurudevur.pdf
    • http://sazaleve.22web.org/jurnal_dermatitis_atopik.pdf
    • https://gidedumewulo.weebly.com/uploads/1/3/5/9/135961218/xagemowudago.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/godewumazek/what_books_are_on_audible.pdf
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_133874ea3ca4409991ae6545c01122df.pdf?index=true
    • https://s3.amazonaws.com/megodipewukitoj/fokubefutilukesup.pdf
    • https://79e5ec13-148a-49e7-9308-7b7844992bd9.filesusr.com/ugd/1d149b_b562b02c22f64a17b05adc259ca3fe4e.pdf?index=true
    • https://b81f28a7-a6cc-4df9-aebb-a76b708ee4b5.filesusr.com/ugd/df05b2_7a3d5592d0f840bfbe2d6ea3683c564c.pdf?index=true
    • https://s3.amazonaws.com/popisiburewixuj/barron_s_sat_practice_test_3_answers.pdf
    • http://sujetokotew.rf.gd/who_guidelines_breastfeeding_hiv_positive.pdf
    • https://s3.amazonaws.com/jemisajoda/the_challenge_inferno_episode_16.pdf
    • https://s3.amazonaws.com/jivagajamav/66612723696.pdf
    • https://5a98ae10-8c7e-48da-b83f-9bcbc644cfa3.filesusr.com/ugd/9a8764_7064954f7c7c4ba3a95960821d9f782a.pdf?index=true
    • https://s3.amazonaws.com/niwotipugonuvoz/338401414.pdf
    • https://s3.amazonaws.com/wewiro/rafinifegepibogire.pdf
    • http://nixevafuzija.epizy.com/ladunaran.pdf
    • https://34e51215-b586-4e01-b3ea-a219475a7b91.filesusr.com/ugd/46481b_d1070fb064cb474cbb007df5c81b6d48.pdf?index=true
    • https://s3.amazonaws.com/rimepusox/40708895400.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e279.bin
0d043773bac573d495e028890977e3ce4d3b778f54f3eb2ee7f28eb2d513d886		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE279 5164 bytes
font_01_sfnt_off0000f41b.bin
94eaccaf59d4f20459bbceef9e76d03b5086e29215560504c4ae4c7740757e71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF41B 10996 bytes

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