Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbce1f4f4cdbffc1…

MALICIOUS

PDF

46.5 KB Created: 2020-03-30 16:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 73d358a08d690506ec96c5ec4c79b23b SHA-1: 03b431f8be625366035e5227de888c87be289897 SHA-256: fbce1f4f4cdbffc13a6c83f06b3c11622967f36b952d7e2af97b2a726185a222
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are dynamically generated and point to SEO-optimized PDF files. The document body, though partially corrupted, contains what appears to be product information and a URL that also leads to an external HTML page. This suggests a link farm or phishing attempt designed to redirect users to potentially malicious websites.

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://wrapworthyoh.com/uploads/1/3/0/4/130489969/130489969.html#cuisinart+dlc-10sy+pro+classic+7-cup+food+processor+white PDF link annotation
    • http://goldcoastlaserteethwhitening.com/uploads/1/3/0/2/130289774/7681109.pdfIn PDF document text
    • http://mydesigninterior.net/uploads/1/3/0/7/130776349/fiwifelixikulof.pdfIn PDF document text
    • http://savcreative.com/uploads/1/3/0/5/130589151/biluzo.pdfIn PDF document text
    • http://homesproperty.net/uploads/1/3/0/5/130551142/guwasonela.pdfIn PDF document text
    • http://mcginleymountainhome.com/uploads/1/3/0/4/130483499/penurexubebibow_mimudix_sawox_xonisupomag.pdfIn PDF document text
    • http://oakleykambel.com/uploads/1/3/0/2/130289380/merilanudene.pdfIn PDF document text
    • http://northernessentialtack.com/uploads/1/3/0/7/130775646/fff336e248dd59.pdfIn PDF document text
    • http://marquisecapitalsolutionsllc.com/uploads/1/3/0/6/130604951/tavarasitazab.pdfIn PDF document text
    • http://cloud9weddingflowers.com/uploads/1/3/0/7/130775980/377b04.pdfIn PDF document text
    • http://afhealth.org/uploads/1/3/0/6/130639591/82c880c74029.pdfIn PDF document text
    • http://suumc.com/uploads/1/3/0/8/130874516/kagiburowujevirebat.pdfIn PDF document text
    • http://mainstreetgrubandpub.com/uploads/1/3/0/3/130324164/3324496.pdfIn PDF document text
    • http://sunflowersignstudio.com/uploads/1/3/0/8/130874086/30f0ce250f18040.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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn 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_off00007f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1A 8864 bytes
SHA-256: efd6b0ba17edaea79c68de990adf119399a7147378e22d6ae58a06634c3c969e
font_01_sfnt_off0000a0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0F0 2616 bytes
SHA-256: d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04

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