Malicious PDF — malware analysis report

Static analysis result for SHA-256 97fa96c152e68558…

MALICIOUS

PDF

82.4 KB Created: 2021-03-06 09:08:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 72659a2d541a7cdc9955de68d7770a7d SHA-1: 771b5b0ab74f8d065a31bbcd32affcbd02216a84 SHA-256: 97fa96c152e68558cfce50c1d579a79c429be5355272a6ac551e4cb912153cd0
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to disposable hosting, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, contains metadata related to its creation, and the presence of numerous external URIs suggests an attempt to redirect users to potentially malicious or spam content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://nipisod.ru/award?keyword=essential+oils+pocket+reference+life+science PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465010/normal_5feb942bee5b3.pdfIn PDF document text
    • http://bodaweziwov.mypressonline.com/kidemijolesuxapenupewek.pdfIn PDF document text
    • https://rezikixudagip.weebly.com/uploads/1/3/4/7/134746502/sazonewufozamibo.pdfIn PDF document text
    • https://judaromoperojog.weebly.com/uploads/1/3/2/6/132681758/jizanixodepofi_penimogoxir_xidafone_lodatotereji.pdfIn PDF document text
    • https://vavaterojitenoj.weebly.com/uploads/1/3/4/8/134898986/xisunavaxidaba.pdfIn PDF document text
    • https://sixisamut.weebly.com/uploads/1/3/5/3/135308299/37a8c221b56f.pdfIn PDF document text
    • https://xoburorabusu.weebly.com/uploads/1/3/0/7/130738623/buxuvuxobin_dirudepuwovomaz_ridige.pdfIn PDF document text
    • https://gororumemi.weebly.com/uploads/1/3/4/5/134517819/kuwib-rosedasugepu-riwezikuxunun-wopov.pdfIn PDF document text
    • https://ligefunodimab.weebly.com/uploads/1/3/1/3/131398292/zobekaj_nigisopuzegewo_lunetigikukivo_bemewiw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473384/normal_5fcaa23031c68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379856/normal_5fca4e5dac6de.pdfIn PDF document text
    • https://kazuvamelu.weebly.com/uploads/1/3/0/7/130738637/6756814.pdfIn PDF document text
    • https://lujoduxatodovaw.weebly.com/uploads/1/3/2/3/132302833/somilexotorizu_timaxavo_jonerud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487005/normal_60175d6b01f26.pdfIn PDF document text
    • https://nasoluludeg.weebly.com/uploads/1/3/4/4/134435301/f21ade87cf3521.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d7ae471b-a447-437d-81b4-4e603f8679d9.filesusr.com/ugd/0a3240_60fdad07447445caa6fcb7bbfb007aa1.pdf?index=trueIn PDF document text
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_f3a958cc4d9b4d4d8d4c9fefa2c14287.pdf?index=trueIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_0edb01655d594d17a99bcb9dabd6c7c8.pdf?index=trueIn PDF document text
    • https://569e8712-2873-4b93-a654-ea71b6b809e3.filesusr.com/ugd/345929_8bad8291094341b7b4815dc67edb61ba.pdf?index=trueIn PDF document text
    • http://temolujipu.myartsonline.com/general_psychology_test_questions_and_answers.pdfIn PDF document text
    • https://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_4c1a074cd64a41aab179c1c7dd63ce68.pdf?index=trueIn PDF document text
    • https://8b8c7005-3af0-45a1-8e5b-a6902caa9335.filesusr.com/ugd/dbd7d9_b01b9608df134db098ae5cb10a4a725a.pdf?index=trueIn PDF document text
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_653fda3c609e4ec3b6c637af533cefcc.pdf?index=trueIn 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_off0001065d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065D 5032 bytes
SHA-256: bcda8e7cb1649d6ab7e8ba171e38e90408d7e8989711f1f82ad923f1443e6a6a
font_01_sfnt_off00011790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11790 10860 bytes
SHA-256: 4a5f226745f2d031aebf99117e8d747517a186023a5e5668f3ec9e4f2875e580

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