Malicious PDF — malware analysis report

Static analysis result for SHA-256 484e561e94877e37…

MALICIOUS

PDF

33.0 KB Created: 2020-03-29 12:09:13 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1a973e5484d7c09066ea19f44e15cd39 SHA-1: b2f354cec19e034061064eb72c60161d73e4476c SHA-256: 484e561e94877e373e152e934857c01dbc626bae4a76df2f3085f08d163adca8
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, many of which are dynamically generated and point to seemingly unrelated content, indicating a link farm or SEO abuse tactic. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves redirecting users to a network of external websites, likely for malicious purposes such as phishing or distributing further malware.

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://qmhle.bpmtc.com/uploads/1/3/0/5/130540897/130540897.html#thinkpad+t530+maintenance+manual
    • http://danielshanethomas.com/uploads/1/3/0/4/130476183/nawurumeduziju-dalag-kiwomomex-jewisimit.pdf
    • http://patgrasso.com/uploads/1/3/0/6/130621916/23c7146a14.pdf
    • http://rmhscafe.com/uploads/1/3/0/8/130813819/lewiduj_birolazokejuda_jujefaniruxozem_befitoradoz.pdf
    • http://therapeuticessentails.com/uploads/1/3/0/6/130604295/minawogeruto_wutobelupu.pdf
    • http://elrinteriors.com/uploads/1/3/1/3/131381781/7375098.pdf
    • http://lucindaalilanding.com/uploads/1/3/0/4/130477420/9a625.pdf
    • http://rsconcrete.org/uploads/1/3/0/5/130550974/mogotawurujamiwez.pdf
    • http://actionstepsnetwork.com/uploads/1/3/0/6/130620773/kulotopufelupiba.pdf
    • http://wd-consult.com/uploads/1/3/0/6/130621405/4a5c86.pdf
    • http://barredorasindustriales.com/uploads/1/3/0/5/130551567/d5e3e8.pdf
    • http://weybridge10k.com/uploads/1/3/0/7/130776262/debazij.pdf
    • http://fioleanltd.com/uploads/1/3/1/3/131379444/rubewe.pdf
    • http://fromfarmandforest.com/uploads/1/3/0/3/130313215/kezokavafadoxip.pdf
    • http://zoommyrent.com/uploads/1/3/0/6/130603673/1bbe3ea603022.pdf
    • http://workout-strong.com/uploads/1/3/0/9/130969714/goxasobazufi_niravalafor_voterara_fixetoxup.pdf
    • http://radicalbasics.ca/uploads/1/3/0/6/130604871/gijukizomuleka_bufoxulosetoze_wovoka.pdf
    • http://thepostellexperience.com/uploads/1/3/0/2/130274345/9406554.pdf
    • http://redesproyectosingenieria.com/uploads/1/3/0/4/130476091/72142792.pdf
    • http://captivatecareerwriting.com/uploads/1/3/0/9/130969445/8839472.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a35.bin
285afabacf56a3b5e7c273124d16141819a9f6178054eada66ca91f53e4d8074		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A35 7212 bytes

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