Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab29fd32529cd638…

MALICIOUS

PDF

98.9 KB Created: 2020-12-18 12:00:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0388a0366a816a2d51683e30eb31b373 SHA-1: 5b95bd5010614e3893a4f1f60bcad727d440498d SHA-256: ab29fd32529cd638ca58517874a2f30b9edb69e91052e11b79fd9bc4f6aaaab0
246 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a seed-phrase/secret-recovery lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://traffking.ru/aws?utm_term=engineering+failure+analysis+report+template PDF link annotation
    • https://tuxupifogufo.weebly.com/uploads/1/3/4/5/134594750/2293603.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406793/normal_5f9ec09ea3b1b.pdfIn PDF document text
    • https://wawurekufa.weebly.com/uploads/1/3/4/3/134322490/72d6a.pdfIn PDF document text
    • https://wudizabilizone.weebly.com/uploads/1/3/4/7/134745746/a778d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418557/normal_5f9ecf3332d09.pdfIn PDF document text
    • https://dodivimibo.weebly.com/uploads/1/3/4/3/134305777/xiwadaxedagav-mamamogeji.pdfIn PDF document text
    • https://sibotapitagota.weebly.com/uploads/1/3/4/3/134378411/lorepada.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/1482248.pdfIn PDF document text
    • https://vufevilasok.weebly.com/uploads/1/3/4/3/134314299/fafof.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/wobuzisibal/43788046392.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de25d650-d8d9-47e1-97a2-141941501e60/the_long_dark_how_to_sleep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fcb4826-320a-4b3a-a3a5-6a02d5480d22/zisuretefasulav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43b8e6f9-672e-450a-ae3d-b36f6c167976/mepapewib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c63724d-8ebf-4c06-bab9-587d0528a883/audacity_vst_enabler_exe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f112679-0132-4af2-8e41-f66f3805f609/fugemazavoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a83c625-68f6-4ae7-ae84-c685625f6cfe/guitar_finger_picks_guitar_center.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5059065-db79-467f-8d44-0b8312038eb3/everstart_1200_peak_amp_jump_starter_manual.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_off000147fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147FC 5280 bytes
SHA-256: f032f5ecd96b652b7384cbc218b15a4918af5b717e60b3b66387def94f88fcaa
font_01_sfnt_off000159f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159F5 10616 bytes
SHA-256: b125a31731a6d00f9655ed0a391d08e05c2cd892396c093536ca455a00bfd01a

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