Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c1d3efc2a360142…

MALICIOUS

PDF

41.2 KB Created: 2020-03-27 13:24:53 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: 5cff9fb79e88aad9336ab13ed206fb90 SHA-1: 070afbde2b107e23d01f3d4fb75334a0d006b402 SHA-256: 7c1d3efc2a360142e566e6450612688930a9ab2c49eda4d01df4bb3dcfeb5e58
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary URL points to an HTML page, while many others point to PDF files, suggesting a link farm or content distribution network. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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://saranlpcoach.com/uploads/1/3/0/6/130640132/130640132.html#triple+integrals+in+spherical+and+cylindrical+coordinates PDF link annotation
    • http://calledefelice.com/uploads/1/3/0/9/130969725/7582655.pdfIn PDF document text
    • http://searchwalk.com/uploads/1/3/0/6/130620820/xeguxoni.pdfIn PDF document text
    • http://m-dsurplus.com/uploads/1/3/0/2/130272862/favazisoj_sekabogex_baziziwegemavo_mawuzodubobap.pdfIn PDF document text
    • http://amalo.org/uploads/1/3/0/8/130874175/5439045.pdfIn PDF document text
    • http://www.stopsmoking2.com/uploads/1/3/0/6/130621213/127561.pdfIn PDF document text
    • http://www.harderide.com/uploads/1/3/0/5/130539922/6867422.pdfIn PDF document text
    • http://srcwwtp.com/uploads/1/3/0/6/130640071/duxotorom.pdfIn PDF document text
    • http://worldofsunshine.nl/uploads/1/3/0/2/130287502/vejojixem.pdfIn PDF document text
    • http://alfanartrading.com/uploads/1/3/0/2/130270808/liwedososu.pdfIn PDF document text
    • http://jennileighcupcakerie.com/uploads/1/3/0/7/130776370/jizuxukatefuwisafo.pdfIn PDF document text
    • http://asbestosinamerica.com/uploads/1/3/0/5/130588672/zagenitorav-napejud-rudegojajeneru.pdfIn PDF document text
    • http://allurebridalsma.com/uploads/1/3/0/7/130738989/kigeduvivaxarumodox.pdfIn PDF document text
    • http://getyourlocation.com/uploads/1/3/0/5/130588430/60ac7b3ab546bb9.pdfIn PDF document text
    • http://blkafrodite.space/uploads/1/3/0/6/130604397/2251918.pdfIn PDF document text
    • http://www.destinrentalbest.com/uploads/1/3/0/5/130588280/dutepa-kirile-zaxekujosab.pdfIn PDF document text
    • http://summeratolg.com/uploads/1/3/0/6/130604093/5185777.pdfIn PDF document text
    • http://jotandjoti.com/uploads/1/3/0/6/130620708/2ca421799296.pdfIn PDF document text
    • http://dallasmendingminds.com/uploads/1/3/0/5/130588328/nomakega.pdfIn PDF document text
    • http://alanpergusey.co.uk/uploads/1/3/0/8/130814508/3069488.pdfIn PDF document text
    • http://runecastlebooks.com/uploads/1/3/0/8/130814190/gixejulike.pdfIn PDF document text
    • http://menedzer.website/uploads/1/3/0/2/130289603/zabimixikazesijure.pdfIn PDF document text
    • http://portandvine.com/uploads/1/3/0/5/130539756/nuxorixamewip-gomipatudov.pdfIn PDF document text
    • http://holehjan.com/uploads/1/3/0/2/130270911/wejax.pdfIn 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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7568 8064 bytes
SHA-256: 8e286928705577f1bd91ba276b1a8a0723c3bfc653258de33041fece3454ce1c

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