Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c284722a2575aa…

MALICIOUS

PDF

66.6 KB Created: 2021-02-10 19:51:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a5f0d44490ecbd2af058a18c0edf2cb7 SHA-1: dc1dcd90a9b8c5f2b56e95a30792802341321be7 SHA-256: 62c284722a2575aa4f00215c799437e5afc88b99d5a6f95d0b0ed2812032c2b7
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 and phishing lures. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the ClamAV detection 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' strongly suggests a phishing or trojanized document. While no scripts were explicitly extracted, the presence of external links and the phishing detection point towards a malicious intent to redirect users to potentially harmful content.

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://bologen.ru/aws?utm_term=english+regents+january+2019+answers PDF link annotation
    • http://mini-camera-super.club/o_perico_mario_flores_moringaebzo9.pdfIn PDF document text
    • http://yogait.space/47456169575w4l87.pdfIn PDF document text
    • https://gakosokilexavum.weebly.com/uploads/1/3/2/6/132695298/601f47.pdfIn PDF document text
    • http://edarudost.online/hunter_s_star_quilt_patternjbf8n.pdfIn PDF document text
    • http://xavubizuj.22web.org/hr_position_interview_questions_and_answers.pdfIn PDF document text
    • https://rozenawaxu.weebly.com/uploads/1/3/4/5/134517597/fexumut.pdfIn PDF document text
    • http://snapchat-alert.com/355592519553ccpp.pdfIn PDF document text
    • https://jurujixomegisi.weebly.com/uploads/1/3/4/7/134745805/7311987.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vubedarav.epizy.com/5125106597.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/smart_tv_android_romania.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/aqours_hakodate_live.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/barbulescu_contra_romaniei.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/18331044594.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/chiron_pharmacy_order_form.pdfIn PDF document text
    • http://buwijakuwomem.rf.gd/16433823846.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/tewovoxexakifapamoxaj.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/gikirinizigidexodoziwovaw.pdfIn PDF document text
    • http://fabonek.rf.gd/call_blocker_ios.pdfIn PDF document text
    • http://gelanuvefod.epizy.com/12000790109.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/kugerobo.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_off0000c58d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC58D 5656 bytes
SHA-256: 8fcda7e8d88bf94e3dec7f257d4cc0572f20e0122c7f0c851fee78e05c5f5312
font_01_sfnt_off0000d8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E9 10524 bytes
SHA-256: d9b8d866aa34a06b6f5a2309197c9d8e8010ea66d00644ee7ea898797856af9c

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