Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ff3aec699471849…

MALICIOUS

PDF

75.2 KB Created: 2020-12-15 09:48:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ed61bbbcde16bc672ad4933855fd59b4 SHA-1: 4bb08b5d0b3adf7a5254ce46b6f51f09bcfa91b6 SHA-256: 5ff3aec699471849247653067b2db4f6b1ec94c4f1216252ee960afc2cb8be3b
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. The document contains numerous external links, suggesting a link farm or redirection to malicious sites, with one prominent URL being https://trafffi.ru/123?utm_term=tj+maxx+returns+to+marshalls. The heuristic 'SE_INVOICE_LURE' suggests the document's content is designed to trick users into clicking links, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://trafffi.ru/123?utm_term=tj+maxx+returns+to+marshalls PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368953/normal_5fd7fa2c49cb6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495392/normal_5fc3c25617b2f.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/59c9804e01b.pdfIn PDF document text
    • https://dagakaxogofawi.weebly.com/uploads/1/3/4/6/134699425/8131582.pdfIn PDF document text
    • https://sopulekazixov.weebly.com/uploads/1/3/0/7/130776801/sapuganivedupadokuri.pdfIn PDF document text
    • https://rikelakejif.weebly.com/uploads/1/3/4/8/134885243/wipumaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473938/normal_5fb97432b9c2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372963/normal_5f95f09c8ad57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371269/normal_5fb716ad258c6.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://static1.squarespace.com/static/5fc124912e34347c70458bc4/t/5fc54cb53570fb44d1b1a42a/1606765751291/rigutijubop.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/video_downloader_apk_fire_tablet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc681d15e8e827d42b49382/t/5fca6134ace1843513877f26/1607098677262/ringtone_maker_download_for_pc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3797e5e8e827d429e31b4/t/5fc88ff88eecd53e39ee1f18/1606979577620/bike_ramps_for_sale_nz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc06ecff7cf8c75402886b4/t/5fc1046861e25426e15c229e/1606485096716/percy_jackson_the_last_olympian_book_report.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc68a6da8793968642f1420/t/5fd6ea46dca221526056100d/1607920199502/wuzovokotokuwo.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/seagate_freeagent_goflex_desk_driver.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_off0000dd89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD89 4852 bytes
SHA-256: b4bea70918e934e175f4cb96494898d8adb816375c366e5627230849d44e5004
font_01_sfnt_off0000edda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDA 10572 bytes
SHA-256: 10f75abfda53b43c56a1fef08c43a6d56e45393380633400c6d530348016ec14
font_02_sfnt_off000111dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DC 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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