Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dc6100ed757932b…

MALICIOUS

PDF

40.8 KB Created: 2020-03-28 12:29:14 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d062f9a2a561de685af1edbd880214d4 SHA-1: 9d200d303039c20c33bbb3fdf6a9a69b77f53f54 SHA-256: 0dc6100ed757932b3abfd1467eebec9307597d7913d366157806bfa015554637
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded external links to other PDF files hosted across various domains. This behavior is indicative of a link farm or a mechanism to distribute malicious content indirectly. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. No scripts were extracted, but the sheer volume of external links suggests a coordinated effort to redirect users.

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://befreetherapy.com/uploads/1/3/0/4/130436390/130436390.html#resist%C3%AAncia+microbiana+anvisa
    • http://maisondelaroyaute.com/uploads/1/3/0/5/130551181/cd1aaba2492.pdf
    • http://the-shriek.com/uploads/1/3/0/9/130970014/877008b1.pdf
    • http://nataliyatodorportfolio.com/uploads/1/3/0/6/130639701/b8e2e.pdf
    • http://myafricanloveseries.com/uploads/1/3/1/1/131163832/kitogagagaxage.pdf
    • http://800us.net/uploads/1/3/0/7/130739340/3f615.pdf
    • http://tennieconstruction.com/uploads/1/3/0/6/130639591/6042719.pdf
    • http://hhr.life/uploads/1/3/0/6/130621208/tekowiwonore.pdf
    • http://orthodontievangeel.com/uploads/1/3/0/5/130551258/7289333.pdf
    • http://fynnad.store/uploads/1/3/0/6/130605001/xekerimomogivi_girabigapepeg_renimigiruduwom.pdf
    • http://cemscompany.com/uploads/1/3/0/5/130543168/31eadd9.pdf
    • http://brokenglass.website/uploads/1/3/0/7/130740375/sasibufasol.pdf
    • http://acesxm.com/uploads/1/3/0/2/130287914/bf42e79.pdf
    • http://bestshoregroup.com/uploads/1/3/0/3/130379367/1208841.pdf
    • http://miriamstambourine.com/uploads/1/3/0/6/130622095/c504450d76.pdf
    • http://nhgamebutcher.com/uploads/1/3/0/2/130272977/330912f.pdf
    • http://allaboutaba.com/uploads/1/3/0/5/130539660/197424.pdf
    • http://bsmimpact.org/uploads/1/3/0/7/130739144/tomonelapovup_zapijibakikid_lizavafomopez_dagol.pdf
    • http://lorrainemeyer.com/uploads/1/3/0/7/130739415/gurogud-kuxum.pdf
    • http://eurekaarchitecture.com/uploads/1/3/0/7/130775462/e82d103.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_off00006b0f.bin
6dfe901b6f968c3a3ddcac1b96ba0bd668935c12a9c7252000bf6818841cc052		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B0F 9256 bytes
font_01_sfnt_off0000896a.bin
6dc6e07f93ae70488a19e8a398a1c6cda2f5723fc3d3cbe180c5afbb10c3611e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x896A 2864 bytes

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