Malicious PDF — malware analysis report

Static analysis result for SHA-256 b75dff8ac7c10031…

MALICIOUS

PDF

41.9 KB Created: 2020-03-10 03:37:03 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 3f9dcb7dcc8ee18b2f9717330ccba715 SHA-1: 90d429751e7b07d554934347c946553c33f64259 SHA-256: b75dff8ac7c10031cab167fdd4af47e9362ac5c30d53bf854a52782267571168
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 pointing to various domains, a technique often used for SEO manipulation or to distribute further malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, indicating a likely attempt to drive traffic to these external sites. The document body itself contains garbled text and some URLs, reinforcing the idea that the primary function is to redirect users. No scripts were extracted from this sample.

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://insureapplewatch.com/uploads/1/3/0/9/130968973/130968973.html#fermentative+production+of+acetic+acid+ppt PDF link annotation
    • http://autoglassbirmingham.com/uploads/1/3/0/9/130969841/4919267.pdfIn PDF document text
    • http://worldwideadultentertainmentselfpromotions.com/uploads/1/3/0/6/130621576/1bc000fe71195.pdfIn PDF document text
    • http://rebirthhypnosis.com/uploads/1/3/0/7/130739904/8504082.pdfIn PDF document text
    • http://learnized.com/uploads/1/3/0/6/130621063/4011625.pdfIn PDF document text
    • http://adventuretested.com/uploads/1/3/0/6/130621597/kositovejit-lekato.pdfIn PDF document text
    • http://builtonselfsuccess.org/uploads/1/3/0/9/130969548/3451351.pdfIn PDF document text
    • http://www.brandonlowe.net/uploads/1/3/0/3/130379145/doxijuvisofekinaka.pdfIn PDF document text
    • http://mindfuldemocracy.org/uploads/1/3/0/5/130588796/6526192.pdfIn PDF document text
    • http://alexdibranco.us/uploads/1/3/0/5/130590673/pekujuz.pdfIn PDF document text
    • http://jordn�raupplevelser.se/uploads/1/3/0/7/130776096/jusosamotimeriwez.pdfIn PDF document text
    • http://webdisk.abccrafts.co.za/uploads/1/3/0/5/130546880/gezal.pdfIn PDF document text
    • http://ultimatemartialartsusa.com/uploads/1/3/0/3/130313657/94ece56a475.pdfIn PDF document text
    • http://mylesateliersdenine.com/uploads/1/3/0/7/130776402/zapekedisew.pdfIn PDF document text
    • http://xn--jordnraupplevelser-ptb.se/uploads/1/3/0/7/130776096/jusosamotimeriwez.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 1

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_off0000658e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x658E 7788 bytes
SHA-256: f86deb00df8581700b31ac9963201cfd6f99955a388117699aecb1d1b4899fb5
font_01_sfnt_off000083a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A7 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63

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