Malicious PDF — malware analysis report

Static analysis result for SHA-256 8183d8cbb4031e5d…

MALICIOUS

PDF

39.0 KB Created: 2020-05-21 12:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: b858a793f3a2ae8c9245a33034967a07 SHA-1: 684c75d48432768b68483c6b49a5a88ca8708acf SHA-256: 8183d8cbb4031e5dff45d588123d983fb4f1f5902fa78c5796ea2dc268c65d88
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links to other PDF files hosted on various domains, indicating a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the structure and numerous external links suggest an attempt to drive traffic to potentially malicious content, possibly as a precursor to further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://groutsanchez.com/uploads/1/3/1/3/131380688/131380688.html#what+is+acrord32.+exe PDF link annotation
    • http://auveratech.net/uploads/1/3/0/9/130969931/kajomezevekiwa-redaladudir-detofotuzipoza.pdfIn PDF document text
    • http://jjlmarketingsolutions.com/uploads/1/3/1/4/131406781/pesewilozidenez.pdfIn PDF document text
    • http://cozycottagepreschool.com/uploads/1/3/1/3/131384336/458243e.pdfIn PDF document text
    • http://josephriccio.com/uploads/1/3/1/3/131381452/d04be94b76f95d.pdfIn PDF document text
    • http://online-personal-coach.nl/uploads/1/3/0/6/130620632/1869740.pdfIn PDF document text
    • http://garciaweir.com/uploads/1/3/0/5/130541803/5202939.pdfIn PDF document text
    • http://mariakalaffdesigns.com/uploads/1/3/1/3/131379530/2491707.pdfIn PDF document text
    • http://elliehackney.com/uploads/1/3/0/7/130775435/16e999.pdfIn PDF document text
    • http://ckpoolparlour.com/uploads/1/3/0/6/130604646/megufavivise_kijekujaxilebam_terixanozuz.pdfIn PDF document text
    • http://thevinylhaven.com/uploads/1/3/1/4/131453214/679563.pdfIn PDF document text
    • http://campaignartwork.com/uploads/1/3/1/4/131406710/kikulalalomupez-zefililuvol-zopifodidan-ganesajexowit.pdfIn PDF document text
    • http://gustafmethod.com/uploads/1/3/1/8/131856594/migovojuw-buzusule.pdfIn PDF document text
    • http://hguadolor.com/uploads/1/3/1/3/131380404/josugunovox_tiludisutilokin_somova.pdfIn PDF document text
    • http://cheshuntteamministry.org/uploads/1/3/0/6/130603979/8104555.pdfIn PDF document text
    • http://fashionandjesuspassion.com/uploads/1/3/1/4/131482859/6467051.pdfIn PDF document text
    • http://comercializadora.org/uploads/1/3/0/9/130969831/e8ad96cfe5d.pdfIn PDF document text
    • http://socializex.com/uploads/1/3/1/0/131070476/raxofefuperekuzex.pdfIn PDF document text
    • http://thehumblemonkey.com/uploads/1/3/1/4/131407588/5952289.pdfIn PDF document text
    • http://dqwaynesboro.com/uploads/1/3/0/4/130436224/6187607.pdfIn PDF document text
    • http://emurphylawoffices.com/uploads/1/3/1/6/131606111/2a91d0a8d851d14.pdfIn PDF document text
    • http://membership.expert/uploads/1/3/0/3/130323631/113261.pdfIn PDF document text
    • http://sgfcon.com/uploads/1/3/0/8/130813921/e425b.pdfIn PDF document text
    • http://laurencarr1.com/uploads/1/3/1/4/131411474/6462941.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

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_off00006c2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2B 10580 bytes
SHA-256: 05c906f9700507656e244cbe79cf3115240509828c6538fbbffebe8221ba3e10

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