Malicious PDF — malware analysis report

Static analysis result for SHA-256 42da0746d60fcdd8…

MALICIOUS

PDF

49.6 KB Created: 2020-03-09 03:13:47 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cf07e582f2c5e55d755fe82a3422cacb SHA-1: e0ca46bdc9fdaf4629bc4c2878f8355cbdeb4a9e SHA-256: 42da0746d60fcdd8c2fea2d567cd3d553142c936505c032d350860a3cda95116
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains URLs that are likely part of a link farm or SEO manipulation scheme, potentially leading to malicious content or phishing pages.

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://x0955303xstreamtravel.xsideas.com/uploads/1/3/0/6/130620672/130620672.html#similarities+between+epicurean+hedonism+and+utilitarianism
    • http://chialreservebelize.com/uploads/1/3/0/8/130814642/5814142.pdf
    • http://anagredo.com/uploads/1/3/0/5/130588966/xageti.pdf
    • http://thservices.net/uploads/1/3/0/4/130489564/9406424.pdf
    • http://synergyhairandbeautyelloughton.co.uk/uploads/1/3/0/5/130540926/449895.pdf
    • http://www.coast2coastdreaming.com/uploads/1/3/0/7/130775911/20e534fecf.pdf
    • http://hansontam.com/uploads/1/3/0/8/130874076/3883110.pdf
    • http://radikal4kidzinc.org/uploads/1/3/0/2/130289565/7236416.pdf
    • http://www.sarahkayhart.com/uploads/1/3/0/4/130435998/wajevotamizurexejiba.pdf
    • http://satanssmile.com/uploads/1/3/0/6/130621194/wubufolo.pdf
    • http://reallymeanmugs.com/uploads/1/3/0/7/130739140/gesojesidu-segiwejor-vejuxonuvajoteb-degikadamas.pdf
    • http://catandcanary.com/uploads/1/3/0/7/130740166/b1632ec9bd6e92.pdf
    • http://safemobility.org/uploads/1/3/0/6/130621965/kararu.pdf
    • http://cantabiletravel.com/uploads/1/3/0/5/130548108/nikexewipawitozajipu.pdf
    • http://ipservices-sam.com/uploads/1/3/0/5/130588220/7095580.pdf
    • http://integration-professionals.com/uploads/1/3/0/6/130620857/6293236.pdf
    • http://www.evelettings.com/uploads/1/3/0/9/130969701/kananagaxejure.pdf
    • http://greenearthteen.com/uploads/1/3/0/6/130620701/c1e85.pdf
    • http://agnesmovie.com/uploads/1/3/0/6/130604429/segavizukamis.pdf
    • http://tianxiazuqiutaici.f18.ebkf.org/uploads/1/3/0/3/130313553/lododokenozop-nutovixebevike.pdf
    • http://waxwingaerial.com/uploads/1/3/0/8/130813883/fafozuwukegepofa.pdf
    • http://redrockmedicine.com/uploads/1/3/0/6/130605498/4826221.pdf
    • http://pitchless.net/uploads/1/3/0/4/130479350/sadopalasom-pawif.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008102.bin
52534b3ded227e054349d710274b458102673ffc813ca18958bb0531e13f2eb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8102 8612 bytes
font_01_sfnt_off0000a218.bin
6a497281c3ce90eec92febdd006241dbd5724e3d2cd9164024538a33245ed7e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA218 16268 bytes

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