Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b0f1952b1224776…

MALICIOUS

PDF

76.0 KB Created: 2021-04-06 00:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ffdd407057d495661ca3da3c9c9988d SHA-1: 7d80af96d920e50462a8ee2855beea9522286152 SHA-256: 9b0f1952b1224776e48a903bebcfbce6463419a58a6b902d8d7bf5f31e7454d2
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one specifically pointing to a URL related to changing a Garmin Nuvi battery. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or phishing attempt. ClamAV detection and ML classification strongly indicate maliciousness, likely related to phishing or scamming operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/strik?utm_term=how+to+change+battery+garmin+nuvi+200
    • https://venivuwaw.weebly.com/uploads/1/3/5/3/135308653/2230799.pdf
    • https://fiselowozol.weebly.com/uploads/1/3/4/3/134366189/pikuziv.pdf
    • https://cdn-cms.f-static.net/uploads/4385010/normal_604a4b473cf58.pdf
    • https://cdn-cms.f-static.net/uploads/4421207/normal_604a5786e44a7.pdf
    • https://xunerekube.weebly.com/uploads/1/3/0/7/130739532/vatunigaki.pdf
    • https://xutogimumunode.weebly.com/uploads/1/3/4/3/134375265/lexamamimofejalo.pdf
    • https://cdn-cms.f-static.net/uploads/4412606/normal_605c5e7e59d87.pdf
    • https://static.s123-cdn-static.com/uploads/4391013/normal_5ff08e0e9c04e.pdf
    • https://radefikifuru.weebly.com/uploads/1/3/4/7/134723330/kuviwo.pdf
    • https://cdn-cms.f-static.net/uploads/4460983/normal_6057af339ab72.pdf
    • https://kerozuvesiduzam.weebly.com/uploads/1/3/4/3/134375161/benure-regadunusob.pdf
    • https://cdn-cms.f-static.net/uploads/4392649/normal_6060ef6d1336f.pdf
    • https://cdn-cms.f-static.net/uploads/4416322/normal_60296cee4e23b.pdf
    • https://cdn-cms.f-static.net/uploads/4388407/normal_6045eb992a35f.pdf
    • https://cdn-cms.f-static.net/uploads/4485005/normal_605f37e552a80.pdf
    • https://static.s123-cdn-static.com/uploads/4465252/normal_5ffcfe32f114c.pdf
    • https://static.s123-cdn-static.com/uploads/4444356/normal_600692b1ce6cd.pdf
    • https://static.s123-cdn-static.com/uploads/4490752/normal_5ff9a61c45c0e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rozebofukixus/berliner_platz_1_neu_a1.pdf
    • https://s3.amazonaws.com/bejikefowu/72290123835.pdf
    • https://s3.amazonaws.com/tuzamada/bluetooth_for_laptop_free.pdf
    • https://s3.amazonaws.com/vexeliku/plural_nouns_in_sentences_worksheets.pdf
    • https://s3.amazonaws.com/donukadizolin/what_kind_of_oil_does_an_ingersoll_rand_air_compressor_take.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb3a.bin
9018e1b6699f126a4f619a860b2b49ea106f9fc5f967e3d50b39997f5f4beb02		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3A 5632 bytes
font_01_sfnt_off0000fe58.bin
76fe7ddfb830fbc5d802da6b50b4a08436f5f18b520aafcf3d62e8540f29b529		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE58 10588 bytes

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