Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae3662e4a7cc06a0…

MALICIOUS

PDF

87.7 KB Created: 2021-02-09 16:45:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c0b7ad0aeec6feeb273d76e0736812fd SHA-1: 7f65babf7588a10d8685517b8b3c6f0a0c90859e SHA-256: ae3662e4a7cc06a0ca812aeb7c7e0adcd12b052750954b6728e952a5cbcc40f9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

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
  • 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://druttle.ru/aws?utm_term=biomaterials+science+ratner+pdf PDF link annotation
    • http://buytoday.cc/bsmmu_ms_admit_cardzh2sj.pdfIn PDF document text
    • https://zanolidades.weebly.com/uploads/1/3/2/6/132695759/joxetarugob.pdfIn PDF document text
    • https://mitafewojoruwe.weebly.com/uploads/1/3/1/3/131381680/3047190.pdfIn PDF document text
    • https://kowedeta.weebly.com/uploads/1/3/0/7/130775164/rofopibilepi.pdfIn PDF document text
    • https://cdn.sqhk.co/lewulula/hairid9/riwarexifakokojaw.pdfIn PDF document text
    • https://ruzizoradum.weebly.com/uploads/1/3/4/3/134317959/af7a4b.pdfIn PDF document text
    • https://xabonawof.weebly.com/uploads/1/3/5/9/135965837/zirazuwiwirume.pdfIn PDF document text
    • https://cdn.sqhk.co/salavogi/MhdfgfY/flip_the_bottle_3d.pdfIn PDF document text
    • https://xafusotegemuwif.weebly.com/uploads/1/3/5/3/135304795/3608163.pdfIn PDF document text
    • http://italiahot.fun/the_giver_chapter_12_questions_and_answers21uq9.pdfIn PDF document text
    • https://cdn.sqhk.co/suxupijisajo/ihjIjTA/lg_washer_and_dryer_smart_diagnosis_app.pdfIn PDF document text
    • https://sowematawenuw.weebly.com/uploads/1/3/1/1/131164153/6259482.pdfIn PDF document text
    • http://drive4mclanemilwaukee.com/cessna_t182t_performance_specs2icrx.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/gighgid/bedoyecta_tri_for_sale.pdfIn PDF document text
    • https://dunewalowipeli.weebly.com/uploads/1/3/1/8/131856746/9054659.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/biwuwukesazef/wakujoribufezelazegotu.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/45696304093.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/2968920207.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/gebipas.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_off000119e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E7 5348 bytes
SHA-256: 2a52c2f170d1008ff3a41a50a1a6b95ab87815052f5587a8c608b2eb96102fdb
font_01_sfnt_off00012bfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFB 10724 bytes
SHA-256: c1cc187878ca6620b976b47c256fcdc07503e84337641493cc9fcecee34a025a

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