Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e4e92c314c5c3e0…

MALICIOUS

PDF

71.3 KB Created: 2021-03-17 12:56:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7527f99346321fc5b3ab1ea63c7c8fc4 SHA-1: be8dd392cd6788361c9869b018ab31a1257a18cd SHA-256: 2e4e92c314c5c3e0ca1e0a060a43ae6a61ae6998dc316ac87e5a9f996e2c8d07
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs and the file's structure point towards a phishing or malicious redirection scheme, potentially disguised as a book PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://golowaki.ru/award?keyword=arihant+ssc+stenographer+book+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425209/normal_600bd362ac924.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427086/normal_60503f7f497b3.pdfIn PDF document text
    • https://nerapusu.weebly.com/uploads/1/3/1/4/131438180/3750573.pdfIn PDF document text
    • https://losuwigawoje.weebly.com/uploads/1/3/5/3/135304717/f0ac2639a.pdfIn PDF document text
    • https://gatokoliza.weebly.com/uploads/1/3/0/7/130739470/mijogibuvod_zozaxofadodenur.pdfIn PDF document text
    • https://soxodoma.weebly.com/uploads/1/3/4/6/134695887/7734195.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528780/normal_601af92dc5eb5.pdfIn PDF document text
    • https://fomoxejuj.weebly.com/uploads/1/3/4/0/134000143/116303.pdfIn PDF document text
    • https://guvoladedesu.weebly.com/uploads/1/3/1/4/131453897/ca28a7947fbb.pdfIn PDF document text
    • https://rawiranuxox.weebly.com/uploads/1/3/4/6/134618620/8250037.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530429/normal_60481c8fa2247.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489853/normal_5fc62c537af3d.pdfIn PDF document text
    • https://jadamoxor.weebly.com/uploads/1/3/5/3/135344742/a8a5a4.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/34c22032-9157-47da-b6ef-e4b7b0566283/tosopuwape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6d7e796-23b8-43a2-93be-ff0ca32430b7/whirlpool_dryer_parts_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cab655e3-5255-4c6f-a993-7ce81120a2ff/el_arte_de_amar_erich_fromm_resumen_capitulo_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1291829c-3be6-4810-a1c8-1176b0891b94/strong_bible_concordance_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15d110b9-6e29-412b-9669-96e438b45a39/mebalowemokeduzajowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4d0327d-0de8-4848-b816-a3e525550c65/74956852370.pdfIn PDF document text
    • https://a4758657-6aaa-4003-b0f6-1957e800abfd.filesusr.com/ugd/70c1f8_695610284b7847b6b246ea8609568f7b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dec65e4-7fb2-4914-98c4-5fbfee3ccee0/mivovixegikaf.pdfIn PDF document text
    • https://167c8e7b-8160-49a2-a88e-f26749d647c8.filesusr.com/ugd/1ad47d_1e351b738dc14581ba4716f6ac35622c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe73cec2-e73c-4b46-81b2-55d589e9f92c/nojojivikosimutufutipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50c53ea7-2f12-4732-8544-508543090aa5/remington_model_552_bdl_speedmaster_review.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_off0000d559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD559 5576 bytes
SHA-256: 4812d1cd14549892d3b3bdb433d781150ebf1d0a4c84883def7bf583a3733657
font_01_sfnt_off0000e846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE846 11372 bytes
SHA-256: 8a43a49d16700882fd5c95f469b09209e75ebb684713d3134983340745bc6958

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