Malicious PDF — malware analysis report

Static analysis result for SHA-256 20369d617dcec4f2…

MALICIOUS

PDF

77.9 KB Created: 2021-03-18 11:37:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8965539dfd6e40fe02fbb766e992ef8 SHA-1: 736456ed1a9d4189423b3a19e609c54a69d67a78 SHA-256: 20369d617dcec4f2ed33212f165e8226e138124c81cb4b5af7b5688c7033b627
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically referencing a 'bakery story 1 hack apk'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document's structure and embedded links suggest it is designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=bakery+story+1+hack+apk
    • https://direwuberegenis.weebly.com/uploads/1/3/4/3/134361890/8ac11d2d6.pdf
    • https://cdn-cms.f-static.net/uploads/4470825/normal_5fe71817d2905.pdf
    • https://static.s123-cdn-static.com/uploads/4455370/normal_5ffdce1ccd69d.pdf
    • https://static.s123-cdn-static.com/uploads/4470526/normal_5fe52de28d014.pdf
    • http://xaraxag.mypressonline.com/19858974056.pdf
    • https://nigiseza.weebly.com/uploads/1/3/4/4/134462574/timesebalobo_nirikukip.pdf
    • https://pekumovulimezel.weebly.com/uploads/1/3/4/3/134363026/nuwukibebitalol.pdf
    • https://static.s123-cdn-static.com/uploads/4470692/normal_5ffbf50731083.pdf
    • https://wubinuju.weebly.com/uploads/1/3/4/6/134642725/6a31151c0e1730b.pdf
    • https://cdn-cms.f-static.net/uploads/4469828/normal_604734c340865.pdf
    • https://guwagigiruf.weebly.com/uploads/1/3/5/3/135303004/zoxewajenozewo-nofajunejim-pusalowatefu.pdf
    • http://jalojewaga.mypressonline.com/99385206724.pdf
    • http://rexonina.medianewsonline.com/aix_commands_quick_reference.pdf
    • https://bopisigo.weebly.com/uploads/1/3/1/4/131453919/rikogu.pdf
    • https://sabalijazot.weebly.com/uploads/1/3/2/6/132695986/vosar-vaxopisak-jumijaburefuvu-sakoketetu.pdf
    • https://static.s123-cdn-static.com/uploads/4368740/normal_60031cf270b43.pdf
    • https://cdn-cms.f-static.net/uploads/4491723/normal_5fe93f5a9f7de.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/naxozelozude/m11_autoclave_error_codes.pdf
    • http://tuzuxutetug.atwebpages.com/15828641343.pdf
    • https://s3.amazonaws.com/tunenijexe/tetifojekexefowe.pdf
    • http://nojikigor.myartsonline.com/xorukodijak.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_off0000f01c.bin
68747c6a1f40bc4da82eb9c9880692d04638d18bb876b5bbe802cebe49083606		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF01C 5256 bytes
font_01_sfnt_off0001020d.bin
02b048fa746b4fe70af37eb1ca17a8ce3f0ea97f8e55409f4e0f581951a8571c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1020D 13272 bytes

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