Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c0dc1c9dc0e6856…

MALICIOUS

PDF

43.9 KB Created: 2020-04-01 21:13:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fa277bc67d169c85b1f8a78c78d06bf0 SHA-1: e96dee912b36af3c10404de08cf8651579fd4670 SHA-256: 8c0dc1c9dc0e6856281ef254af2a31aae9261d36406c8bafbf65a47c3d84a912
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or SEO manipulation tactic, potentially used to distribute malicious content or improve search engine rankings for malicious sites. The ML classifier strongly flagged this PDF as malicious, supporting the suspicious nature of the numerous external links.

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://lancasterec.com/uploads/1/3/0/7/130738781/130738781.html#como+hacer+un+bosquejo
    • http://heartworkbykatie.com/uploads/1/3/0/4/130483821/napowok_fejesufux_devote_togejojuke.pdf
    • http://jesumene-hr.com/uploads/1/3/0/3/130323592/a5d06.pdf
    • http://asiaelisephoto.com/uploads/1/3/1/1/131164314/xawasu_dotopivowonu_kogomadanudituv_nafumope.pdf
    • http://gracecartercapstone.com/uploads/1/3/1/4/131408248/5212032.pdf
    • http://kravepixel.net/uploads/1/3/0/2/130289333/7253649.pdf
    • http://dorrtohealth.com/uploads/1/3/0/7/130776656/nawapesilodi.pdf
    • http://abstainpureandsimple.org/uploads/1/3/0/2/130287893/mudulirer_giporosus_noborizeviko.pdf
    • http://mynatura.org/uploads/1/3/0/9/130969656/ff5cc74a05.pdf
    • http://wildfantasycat.com/uploads/1/3/1/4/131453291/kinupokire.pdf
    • http://arrezmobilenotary.com/uploads/1/3/1/3/131380440/favigomafalu.pdf
    • http://megan-wallace.com/uploads/1/3/0/2/130289347/votofigivis_dagujitife_ziwifazere.pdf
    • http://tahiracleaningservice.com/uploads/1/3/0/6/130639305/5897597.pdf
    • http://nowthentic.com/uploads/1/3/0/5/130551656/305cfae.pdf
    • http://creativecrossesbykatrina.com/uploads/1/3/0/7/130738650/c3046bf.pdf
    • http://davekuhn.com/uploads/1/3/0/8/130813827/63151.pdf
    • http://332madisonstreet.com/uploads/1/3/0/9/130969580/nemopasod-gipuzonolazogil.pdf
    • http://prometheanpress.net/uploads/1/3/0/6/130620450/2693719.pdf
    • http://www.lizakateisgreat.lizaeckert.com/uploads/1/3/0/2/130287813/d24dbccfc5.pdf
    • http://baltimorechildanxiety.com/uploads/1/3/0/4/130488181/ruxil.pdf
    • http://jphotograhics.com/uploads/1/3/0/2/130289542/lurutixok.pdf
    • http://inspiredbathandbody.com/uploads/1/3/0/3/130323622/2366698.pdf
    • http://pathfans.com/uploads/1/3/0/6/130639860/wuxazel_dixan_kadevatuzadero.pdf
    • http://blairthebelle.com/uploads/1/3/1/3/131379193/5430612.pdf
    • http://garmarxtrains.com/uploads/1/3/0/2/130272485/zelim_mebinif_moxisofos_xefotijiwol.pdf
    • http://rootfivefarm.com/uploads/1/3/0/3/130323527/8961398.pdf
    • http://garmarxtrains.com/uploads/1/3/0/2/130272485/zelim
    • 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_off00008125.bin
831cc9e6f2a38c063c77d6d4387526eb211058723a16ab897000eba62c66c16c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8125 8644 bytes

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