Malicious PDF — malware analysis report

Static analysis result for SHA-256 046378491db8f9c0…

MALICIOUS

PDF

75.0 KB Created: 2021-05-24 07:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9edf8c3ed61526ed2ead8d724c0f12d5 SHA-1: e9bfc7aec0a0a9252209229887591ab98b8dfbff SHA-256: 046378491db8f9c09a22319d4e476ab12710685ca591e30c1267fb7dcd38dd1c
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to disposable domains, a characteristic of phishing and link-farming operations. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to external malicious sites, likely for credential harvesting or malware delivery.

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 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://jumiwimov.ru/strik?utm_term=ejemplo+de+texto+expositivo+corto+con+su+estructura PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4480162/normal_60090951cbe0b.pdfIn PDF document text
    • https://salofapaj.weebly.com/uploads/1/3/4/3/134314320/4183927.pdfIn PDF document text
    • https://gopogaxewose.weebly.com/uploads/1/3/4/0/134013169/jiriwasujovibu.pdfIn PDF document text
    • https://funotagikaxu.weebly.com/uploads/1/3/1/8/131857914/dcdf64b2835.pdfIn PDF document text
    • https://naxizugopigonav.weebly.com/uploads/1/3/1/4/131408516/kifuga.pdfIn PDF document text
    • https://vokarojunez.weebly.com/uploads/1/3/2/6/132696330/4a43b2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374522/normal_60640c4cc3945.pdfIn PDF document text
    • https://livadasim.weebly.com/uploads/1/3/4/3/134312527/4918b06f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415530/normal_6017997a6c321.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416675/normal_602c7b0fe9291.pdfIn PDF document text
    • https://nanexore.weebly.com/uploads/1/3/5/3/135351495/samelabukovesakatij.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/98e8369b-74e6-4264-a150-cd21e5c0a43b/hoover_dual_power_max_carpet_washer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/wisonokuz.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/duodenal_ulcer_diet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21ca750a-8bf1-40ce-a537-4185d9a1caab/gress_words_meaning_step.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/is_speed_kills_movie_based_on_a_true_story.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/ruxoxopexafalawajoxano.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/mekemumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e70f2ee4-8e96-4565-bf6e-9248451a14e5/97853058260.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_off0000e63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63F 5380 bytes
SHA-256: 3803602c0f89cfc78a3c68b492f4e863a1bf010357c8146156b7ef1ec35051bd
font_01_sfnt_off0000f881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF881 11092 bytes
SHA-256: a905479cadb4cb0cd931cbed970122bef835e24f32d109b3b2a563ee0158f0e6

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