Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d8551e976fb43c…

MALICIOUS

PDF

72.2 KB Created: 2020-11-21 23:20:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1701b462f76242fe6e649e4ddcf37516 SHA-1: 1dbb6ef5b11c0e544523e283d6777311bac2312b SHA-256: 12d8551e976fb43c9f68783b64bf4f78cc834ba58a52c3e96a3b932814e4f973
136 Risk Score

Malware Insights

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

The PDF document contains a heuristic firing indicating it's a phishing lure using an SEO redirector. The embedded URL, https://trafftec.ru/aws?utm_term=contract+agreement+template+microsoft+word, is likely the destination for this phishing attempt. ClamAV also detected this file as Pdf.Phishing.Trojan, further supporting the phishing classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafftec.ru/aws?utm_term=contract+agreement+template+microsoft+word PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467601/normal_5fa788c8b46f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392656/normal_5fa16d824eba8.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://uploads.strikinglycdn.com/files/ecc7f535-c171-4543-bf20-c8ce2b904501/68565101088.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d19dd1c3-5dac-4f2e-b206-584c1dceee42/e_roblox_card.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea903434-9127-49ac-81ad-a7782b23f3ed/64113735772.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/41097770105.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c04aceb-522a-48d8-8da6-ee70f45b94e6/koxasanebeti.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/2008328209.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71e87611-3fd3-4702-829a-72a056461919/79328876272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92c3caf7-e154-4dde-8d68-36ad339c8c06/siturotutisizelirexenowen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5f3c21c-c00d-4d4c-9a2c-34cbc42b46bb/jital.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f812b5a-f5a6-4705-87a3-a00151b0c321/89326203980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e534166f-3eb4-4ffa-a144-7396201d7839/effective_practices_in_early_childho.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdbd5738-2a17-455a-b054-7731b315e90b/mexis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f91c4475-9e0d-498e-bbd1-048871404f69/wudimu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f4375aa-53f7-44ac-9b5e-34ab2213d6da/indian_gaming_regulatory_act.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff1ba324-7f92-40b6-894b-08ac306c8750/ginejexowikixuditire.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_off0000d103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD103 5376 bytes
SHA-256: 06e7cb21cf352525a68ca986602bac3e588b899e395d7a1e7349c97d1abb1ea5
font_01_sfnt_off0000e341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE341 10036 bytes
SHA-256: 717a230e2c7a4280aa62882b51c6ae39e5db86e3fa99265061ffae96d220a09f
font_02_sfnt_off0001056d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2