Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bf52a14678b6168…

MALICIOUS

PDF

46.6 KB Created: 2020-03-07 19:18:18 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 6265efab9a8fd58dff3b11c8a3bdd4ed SHA-1: 3e2f79b6a968453f35887b63d9b50a61a2795fab SHA-256: 3bf52a14678b6168439eaf0b987c95c9bcae0d0b1729288aacfdd2eeebcdddf3
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to similarly structured URLs on different domains. This indicates a link farm or redirection scheme, likely intended to drive traffic to malicious or ad-heavy sites. The document body itself is heavily obfuscated but contains references to the external URLs, reinforcing the attack pattern.

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://mrmacbiblebook2.com/uploads/1/3/0/3/130313458/130313458.html#auricular+acupuncture+points+for+sciatica PDF link annotation
    • http://allsportssuperpool.com/uploads/1/3/0/6/130604359/fugomebikip_muwanawalivana_kakuragaba.pdfIn PDF document text
    • http://mindfullymolly.com/uploads/1/3/0/5/130542755/3235004.pdfIn PDF document text
    • http://zilischasphalt.com/uploads/1/3/0/4/130435574/tivoza_sumesarikusivir_rozog_dakejitola.pdfIn PDF document text
    • http://soterianow.com/uploads/1/3/0/7/130739116/2453049.pdfIn PDF document text
    • http://vanquissecurityltd.com/uploads/1/3/0/5/130538818/9784485.pdfIn PDF document text
    • http://cornerstoneinsuranceservices.com/uploads/1/3/0/7/130775647/wimilijebemevege.pdfIn PDF document text
    • http://thirddraftlife.com/uploads/1/3/0/9/130969937/gozunuzalos-lekut-temor.pdfIn PDF document text
    • http://www.bigolafmedia.com/uploads/1/3/0/5/130588893/3077829.pdfIn PDF document text
    • http://roundtheclockrelay.org/uploads/1/3/0/8/130814492/fojijodig.pdfIn PDF document text
    • http://calhouncountywaspsandflies.org/uploads/1/3/0/6/130604779/b1897a7cb.pdfIn PDF document text
    • http://alexhallahan.com/uploads/1/3/0/6/130639393/9625028.pdfIn PDF document text
    • http://mtbaf.com/uploads/1/3/0/3/130323110/sefofute-xetuvetadimun.pdfIn PDF document text
    • http://createdbyrellyrel.com/uploads/1/3/0/3/130379058/6114915.pdfIn PDF document text
    • http://f-ckprobably.com/uploads/1/3/0/6/130605421/bulobop.pdfIn PDF document text
    • http://mnrentalhome.com/uploads/1/3/0/2/130291415/8147799.pdfIn PDF document text
    • http://southernilwhitetails.com/uploads/1/3/0/6/130639062/3018dec9.pdfIn PDF document text
    • http://mail.vidairkennel.com/uploads/1/3/0/4/130488666/ef81d47b8.pdfIn PDF document text
    • http://tier1painting.com/uploads/1/3/0/4/130476162/nopudov.pdfIn PDF document text
    • http://sidekickvsc.net/uploads/1/3/0/6/130621216/punelufepusami_mamikale_fapok_jajoximimupinuj.pdfIn PDF document text
    • http://amplusadvecta.com/uploads/1/3/0/4/130476242/596720.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7983 7636 bytes
SHA-256: 29cb72c5c21c3eba38227defee54dfe523c88ac13c45ff5de6889ba21b2a665a
font_01_sfnt_off00009722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9722 16204 bytes
SHA-256: f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d

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