Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1ee11673136646a…

MALICIOUS

PDF

81.4 KB Created: 2021-03-24 09:36:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 05d7de053b55ee6620efef36415fe8b4 SHA-1: 572d1aed1b4c2792241b80e476936dbe9226da2e SHA-256: c1ee11673136646a6e87349930006d864ed4ce12f813ad180df18b7ce8481fbe
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9954

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
  • 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://gimoguvi.ru/123?utm_term=work+overtime+transformers+tcg PDF link annotation
    • https://vigofamuzozovi.weebly.com/uploads/1/3/4/6/134671609/jopidamafapisezu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369629/normal_60282ed8524c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475734/normal_60486ba977d55.pdfIn PDF document text
    • https://rifakinuzofu.weebly.com/uploads/1/3/0/8/130815009/2b20ab93174fb99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489041/normal_5fde622098887.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444378/normal_60481f865d426.pdfIn PDF document text
    • https://fuwelajefupeze.weebly.com/uploads/1/3/5/3/135390198/6be4c5.pdfIn PDF document text
    • https://fikakexuk.weebly.com/uploads/1/3/0/7/130775276/pekexopiwimudag_fobakimo_mowatigulalum_xemusif.pdfIn PDF document text
    • https://zazalefofano.weebly.com/uploads/1/3/4/5/134578352/tudabinekow.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/panalipolifod/tubodosajuw.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/7_day_diet_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/flawless_beyonce_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/what_is_iso_9000_quality_standards.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/21st_birthday_invitations_boy_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68a9906c-2ed0-4f2c-98cc-38dc7d61706e/miller_and_levine_biology_florida_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/tarodapaguzozitewamegalis.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/windows_7_ultimate_patch_activation_free.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/dexes.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/pawiwi.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/63609907935.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/55360533668.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/boxezaxonugudixatoniki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/967c4408-a492-484e-a2a1-e512c757f7c7/29137541238.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e25b1640-763e-45ae-8f08-e961ab21641a/liwavupozipurajeloma.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/2772310873.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/sigerikesezolaluvopuxanix.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_off0000f31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31D 5304 bytes
SHA-256: eff63c3098ee138873f5680c54a47ca202e648603289a0184aa4f9722cfc5294
font_01_sfnt_off00010520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10520 3036 bytes
SHA-256: b06b0e2464790f33c78fc163423d18792f2668335f73e84930bd5a843ef50727
font_02_sfnt_off000111a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A1 10640 bytes
SHA-256: 8c74a76f804e78d9fbbf4391baed23db2dd390cb96d992bcd580114b7b460876