Malicious PDF — malware analysis report

Static analysis result for SHA-256 0df5d5527149312a…

MALICIOUS

PDF

45.3 KB Created: 2020-04-01 21:03:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 44d8dde8a25196ac6f87bdd5207b74a2 SHA-1: 1ffb43254dcb31f14faa328b35e21a15f1a310e7 SHA-256: 0df5d5527149312a4a9f54f87764fef2a8e873e43f9eaef49f76297d946b903d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded links to external websites, many of which appear to be part of a link farm. The primary purpose seems to be directing users to these external resources, potentially for malicious purposes such as phishing or malware distribution. No scripts were extracted, and the document body is heavily obfuscated, making a more detailed analysis of intent difficult.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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 http://getyourbody.org/uploads/1/3/0/6/130620249/130620249.html#naz%C4%B1m+hikmet+b%C3%BCt%C3%BCn+%C5%9Fiirleri+kitapyur
    • http://teachersofeg.org/uploads/1/3/0/6/130603847/3142090.pdf
    • http://kyles-kitchen.com/uploads/1/3/0/7/130776454/2459062.pdf
    • http://vaikhariacharya.com/uploads/1/3/0/5/130551675/fowonowasawoxu-babij-tujaxe-labaromuni.pdf
    • http://dalulovespells.com/uploads/1/3/0/6/130605389/fuzofakusebazi.pdf
    • http://leefortravel.com/uploads/1/3/0/4/130436130/339da2.pdf
    • http://torontopost.org/uploads/1/3/0/6/130605248/8545929.pdf
    • http://southcobbcastle.com/uploads/1/3/0/2/130289214/b13935.pdf
    • http://ibongurrutxaga.com/uploads/1/3/0/5/130538866/2999989.pdf
    • http://sciartcenter.org/uploads/1/3/0/7/130739493/vaxasalawexasipovu.pdf
    • http://janerickluzuriaga.com/uploads/1/3/0/5/130538866/xinovazonij_juxonowepadi_lemufogux.pdf
    • http://negihotels.com/uploads/1/3/0/5/130588417/1771071.pdf
    • http://girlfriendsfitnessparsons.com/uploads/1/3/1/4/131409035/fevixobexirari.pdf
    • http://denizciyoga.com/uploads/1/3/1/3/131379726/3989b.pdf
    • http://cambridgeasparagus.org/uploads/1/3/0/6/130640094/126249.pdf
    • http://littlemissdiamondpageant.com/uploads/1/3/0/7/130739747/6584268.pdf
    • http://jewelrybyjimpluhar.com/uploads/1/3/0/4/130476006/filusekejaf_lewukuninu_kusokugudoxen_mogono.pdf
    • http://windowcleaningsm.com/uploads/1/3/0/6/130604945/sojoluxo-bopelerudegopa-dazefuwatamir.pdf
    • http://writeofftherails.com/uploads/1/3/0/5/130546036/7857678.pdf
    • http://newlife4jesus.com/uploads/1/3/0/6/130620472/winudofotuka.pdf
    • http://crystalrheadesigns.com/uploads/1/3/0/5/130539992/66c0de681760ab.pdf
    • http://searchersend.com/uploads/1/3/0/7/130776351/womasisuta-mipunisapow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078b7.bin
60d30f4bf0f6369203884b697289bcedfd278a21a7d753597e9ec6e3838b10b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78B7 10160 bytes
font_01_sfnt_off00009b8f.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B8F 2652 bytes

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