Malicious PDF — malware analysis report

Static analysis result for SHA-256 679f7ed2cb15e68a…

MALICIOUS

PDF

74.9 KB Created: 2021-04-05 19:31:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 897ec4cd3396c931eb4baaca79916891 SHA-1: 2933f95da6c9486f10d3c236f6b123ea30e9f655 SHA-256: 679f7ed2cb15e68ac068c0fdb28cd59fa1f660c0c9f22179ffe2fa8587f184e8
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, and ClamAV detected it as 'Pdf.Phishing.Trojan'. The primary URL, 'https://jottigo.ru/strik?utm_term=legal+case+brief+examples', suggests a lure related to legal documents to drive traffic to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://jottigo.ru/strik?utm_term=legal+case+brief+examples PDF link annotation
    • https://cdn.sqhk.co/puxedimuwo/C6jezgj/buzzards_bay_brewery_westport.pdfIn PDF document text
    • https://cdn.sqhk.co/tofigidukug/GggejjA/assassin_s_creed_odyssey_amazonian_outfit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415527/normal_605ffc290d301.pdfIn PDF document text
    • https://cdn.sqhk.co/nawiwola/yHFrhbG/tap_tap_maze_dash_online.pdfIn PDF document text
    • https://fimegelepa.weebly.com/uploads/1/3/3/9/133999933/202033.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_602a1fccd090b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418985/normal_5fd30d76c2713.pdfIn PDF document text
    • https://cdn.sqhk.co/xalibolopov/hoDheR9/36284235790.pdfIn PDF document text
    • https://cdn.sqhk.co/narobalof/aXieJxU/lulami.pdfIn PDF document text
    • https://cdn.sqhk.co/sawitofi/LFrjejc/58828362716.pdfIn PDF document text
    • https://kejobogufepemis.weebly.com/uploads/1/3/0/7/130775396/dixelazo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458431/normal_604f400766eb3.pdfIn PDF document text
    • http://obmenkalnr.online/4383029165ozeyf.pdfIn PDF document text
    • https://cdn.sqhk.co/nisisepolo/ZpEkhjK/lirukelenu.pdfIn PDF document text
    • http://makamar.online/letamomivefleu4.pdfIn PDF document text
    • https://cdn.sqhk.co/lagazowasobo/mYDbBLy/47776949327.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/wizedumi/74554240544.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/yamaha_mg20xu_case.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/clothes_folding_board_template.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE630 5484 bytes
SHA-256: 4abe446211d4463fb7663757c0c3a2102470ca65f05efdb2a327d18f087fbe9a
font_01_sfnt_off0000f8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CB 11196 bytes
SHA-256: 7292a927055790ccd55eed2fcdd44df0323b431dc7c6ca9183ce0a4d2968e1d5

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