Malicious PDF — malware analysis report

Static analysis result for SHA-256 c66086697c51c69e…

MALICIOUS

PDF

43.5 KB Created: 2020-03-11 09:11:37 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 18c5daaf739ea17bb43f31070b92ff21 SHA-1: 31df45b900ba9aa45d33d0dfa47d1799fd0e5808 SHA-256: c66086697c51c69e95f2b2581fe980f25832d77ea6087b5b7357bd45d537277c
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded document body text, though heavily obfuscated, contains URLs that are also listed in the extracted URLs. The primary function appears to be directing users to a multitude of external PDF files, likely for malicious purposes such as distributing further malware or phishing content.

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://armandinnovations.com/uploads/1/3/0/7/130739964/130739964.html#alcatel+one+touch+idol+2+mini+rom PDF link annotation
    • http://philanthropyexchange.net/uploads/1/3/0/6/130604821/7744746.pdfIn PDF document text
    • http://prouni2025.net/uploads/1/3/0/5/130590443/wiwinobet.pdfIn PDF document text
    • http://strategic-divorce.com/uploads/1/3/0/4/130488199/vumosu-basewuxefawipu-vubajemulanave-vutosupigiza.pdfIn PDF document text
    • http://b-millers.com/uploads/1/3/0/6/130620660/likol.pdfIn PDF document text
    • http://latriboo.com/uploads/1/3/0/7/130740342/fejij.pdfIn PDF document text
    • http://www.turnaroundwear.co/uploads/1/3/0/7/130739462/nuvevobar.pdfIn PDF document text
    • http://infinityinnovations.org/uploads/1/3/0/3/130323526/7cd39445.pdfIn PDF document text
    • http://octoberdreamsfarm.com/uploads/1/3/0/3/130313235/tubajenedakat.pdfIn PDF document text
    • http://expresswash.net/uploads/1/3/0/2/130291415/pokow.pdfIn PDF document text
    • http://brecht.holyrood-drama.com/uploads/1/3/0/7/130738830/sizepatomifaxej-wajiweke-tizoro-mixasilavexeb.pdfIn PDF document text
    • http://www.wanderingtrailsflowers.com/uploads/1/3/0/3/130379492/zaganixitugonu.pdfIn PDF document text
    • http://ahoconline.com/uploads/1/3/0/7/130739656/11d1036a.pdfIn PDF document text
    • http://bigleaffarms.com/uploads/1/3/0/6/130621706/7d6b281044c974.pdfIn PDF document text
    • http://muchasgracias.com/uploads/1/3/0/5/130590356/52746fa514b02.pdfIn PDF document text
    • http://meredithemiller.com/uploads/1/3/0/5/130589156/1736298.pdfIn PDF document text
    • http://villamklima.com/uploads/1/3/0/5/130545581/ninajutapes.pdfIn PDF document text
    • http://www.bgcsjc.com/uploads/1/3/0/2/130272390/8438519.pdfIn PDF document text
    • http://pathfinder-health.info/uploads/1/3/0/7/130776539/255501.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

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_off00007599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7599 8476 bytes
SHA-256: efd1c3c9b7992ecff64faacede9fea9a9d3a0ac22dd6f78e2b3f8675fb5d5049
font_01_sfnt_off000094db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94DB 2668 bytes
SHA-256: 66fcdd5b598ee21ac9d0921dd4df6e155a1faad446958e5ba9ee1b1ad4812425

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