Malicious PDF — malware analysis report

Static analysis result for SHA-256 46d5a79784d5f370…

MALICIOUS

PDF

71.9 KB Created: 2021-06-02 20:30:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 70638ccc73077bb6d663b2e9671e7e17 SHA-1: f77de59bbead8b0e362cac95d756100086870bb0 SHA-256: 46d5a79784d5f37093ec2c3cf3b7f212131a7dc823c07ef9e9875e4fc4a4c97e
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, https://archism.ru/pbw?utm_term=what+do+i+name+my+discord+server, is likely part of this scheme. No scripts were extracted, but the PDF structure itself is indicative of a phishing or malicious redirection attempt.

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.
  • 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://archism.ru/pbw?utm_term=what+do+i+name+my+discord+server PDF link annotation
    • https://joluduloj.weebly.com/uploads/1/3/4/2/134266967/6844bfa.pdfIn PDF document text
    • https://vixananuxa.weebly.com/uploads/1/3/4/8/134881407/c752e859df40200.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365607/normal_5ff4024dd7521.pdfIn PDF document text
    • https://lonopowixeza.weebly.com/uploads/1/3/4/6/134620564/rojexedomap_xajewulos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445737/normal_602fc83be6e98.pdfIn PDF document text
    • https://jozurukezareta.weebly.com/uploads/1/3/4/7/134741488/d1d16fe9.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/4037774.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488804/normal_6045141a4c3b2.pdfIn PDF document text
    • https://finibolamojirum.weebly.com/uploads/1/3/5/3/135341575/zumivijizuma.pdfIn PDF document text
    • https://tipureroxagojox.weebly.com/uploads/1/3/6/0/136096040/9845871.pdfIn PDF document text
    • https://zidepodip.weebly.com/uploads/1/3/0/7/130775192/4341886.pdfIn PDF document text
    • https://giwizakewat.weebly.com/uploads/1/3/1/8/131857916/rekenopalux-kexavunupim-baruvibodin.pdfIn PDF document text
    • https://sumajodezidozi.weebly.com/uploads/1/3/3/9/133997227/nexixibowaseru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382408/normal_5ff0cf2664183.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/63eb1f2c-937a-4878-9afa-e0f2195ea674/fun_aa_topics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db04f894-a2f9-4d2c-a7f2-f9852e3d38b4/tinaxalorafuretuxumupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8264d1c1-9aa9-449f-b07b-6b0994c1f50c/descargar_google_traductor_ingles_espaol_espaol_ingles_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1f40754-bd2b-4f70-b864-039945d95d21/disney_princess_snow_white_name.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cdce71e-9a15-4e5b-96b7-e0f291dd0309/vtech_cordless_phone_answering_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2fd2e5f-53dd-46d4-b435-08fd75490a17/how_to_clean_the_rug_doctor.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_off0000dbf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF6 5320 bytes
SHA-256: bc14696db2fad9e0847623f9331aaf773742af55021e30eded47eefa6dfe9c41
font_01_sfnt_off0000edf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF7 10712 bytes
SHA-256: c4a18abbf90f65fe5d39c1ce53a22117d7a4f2f7e9cefe2ed44ece545e36d994