Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b286ef9aa3e16a0…

MALICIOUS

PDF

74.4 KB Created: 2021-06-05 22:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 321a8faeebff4bd9e2d121af1fc39732 SHA-1: e87e8242637b1e103b689f92c33a5e6556fdef19 SHA-256: 2b286ef9aa3e16a01ec3967f4ddbf3065ec8430b651066e0ef78e18a199a5771
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains a large number of external links, many hosted on disposable domains, suggesting an attempt to redirect users to malicious content or phishing sites. The document body, though heavily obfuscated, contains keywords related to financial guidelines and income, likely serving as a lure for the scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/123?utm_term=fannie+mae+guidelines+on+commission+income
    • https://rabavuvorek.weebly.com/uploads/1/3/1/0/131070866/5646443.pdf
    • https://vamarimorojikav.weebly.com/uploads/1/3/4/6/134640123/nenuluwu.pdf
    • https://wipabobape.weebly.com/uploads/1/3/5/9/135985954/pipiwenidoxe.pdf
    • https://gexawagezawa.weebly.com/uploads/1/3/2/6/132682787/8405701.pdf
    • https://kujepilam.weebly.com/uploads/1/3/5/3/135343620/lusagorulo_xavonofase_vomak.pdf
    • https://vutadatibanol.weebly.com/uploads/1/3/4/8/134883393/2ddedb1.pdf
    • https://jakidanumamew.weebly.com/uploads/1/3/4/8/134881834/gebusiligebo.pdf
    • https://lutowixo.weebly.com/uploads/1/3/4/7/134705225/1db7e87f55f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://molosafokaji.pbworks.com/f/fortune_500_top_companies_to_work_for_2020.pdf
    • http://rixepal.pbworks.com/f/15592897102.pdf
    • http://varulemenel.pbworks.com/f/66782469475.pdf
    • http://fosirodovo.pbworks.com/w/file/fetch/144601878/how_to_make_character_certificate_from_gazetted_officer.pdf
    • http://kelivesas.pbworks.com/w/file/fetch/144455178/what_does_prednisone_cure.pdf
    • http://xiwitanul.pbworks.com/f/25535895478.pdf
    • http://kipizasuzeda.pbworks.com/f/joe_manganiello_evolution_free_download.pdf
    • http://pitavumiza.pbworks.com/w/file/fetch/144623394/38113016398.pdf
    • https://uploads.strikinglycdn.com/files/7282f862-fc69-4fd7-932e-59de4536fc72/most_common_ar_15_round_size.pdf
    • http://letonepamusi.pbworks.com/w/file/fetch/144440220/db2_sql_error_sqlcode-552_sqlstate42502_implicit_create_schema.pdf
    • http://gufabewa.pbworks.com/w/file/fetch/144454161/what_to_say_to_my_parents_on_their_anniversary.pdf
    • http://kufujibumufa.pbworks.com/f/93564114576.pdf
    • https://uploads.strikinglycdn.com/files/4c348014-c640-4690-944d-252e433890e6/harmony_unity_and_variety_in_art_definition.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_off0000e540.bin
555715ddd1df90f32555d7c21b8e99abdfb397cd5b47cdc501e156cdf9a4cb5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE540 5116 bytes
font_01_sfnt_off0000f6a1.bin
1db766ea9a1b6b9e02052b9e3542de12181649a4291a4fef8251d9a475f63c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A1 10912 bytes

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