Malicious PDF — malware analysis report

Static analysis result for SHA-256 d45b7c38a5e6db51…

MALICIOUS

PDF

62.0 KB Created: 2020-04-03 13:41:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: 82099f8b53a5d34a9cf243ee19b25b56 SHA-1: d67adc452bde4cfb575f78bc9169c43b4c6e3028 SHA-256: d45b7c38a5e6db51c428e2d08b6b39b0d69cacf408cb4059818236f96e0fe43e
96 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files and HTML pages hosted on different domains. The primary purpose appears to be SEO manipulation or directing users to a large collection of potentially malicious content. 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://clearlaketreeservice.com/uploads/1/3/0/6/130604729/130604729.html#en+que+orden+leer+los+libros+de+percy+jackson PDF link annotation
    • http://vision3health.com/uploads/1/3/0/2/130272385/zatonifokovuvasizu.pdfIn PDF document text
    • http://randalltruckline.com/uploads/1/3/0/3/130313199/besadidat-fugebalune-wuvijuret.pdfIn PDF document text
    • http://islaverdevacationrentals.com/uploads/1/3/0/8/130874213/gamim_kejoverudezoz.pdfIn PDF document text
    • http://johnaadams.com/uploads/1/3/0/5/130539269/gexepajugapajapugi.pdfIn PDF document text
    • http://armacconstructionservices.com/uploads/1/3/0/6/130639370/6706940.pdfIn PDF document text
    • http://sussexgardenservices.com/uploads/1/3/0/5/130539913/8593575.pdfIn PDF document text
    • http://kingteasdell.com/uploads/1/3/0/6/130604307/razujuzapug_vediru_leruzu.pdfIn PDF document text
    • http://run-u-nut.org/uploads/1/3/0/7/130740502/8711686.pdfIn PDF document text
    • http://tatoboutique.com/uploads/1/3/0/4/130488357/0f80ffbb90602.pdfIn PDF document text
    • http://www.prayinguponastar.com/uploads/1/3/1/0/131070983/3928112.pdfIn PDF document text
    • http://wheelchairstogoamerica.net/uploads/1/3/0/7/130738929/safoxovowuja.pdfIn PDF document text
    • http://logicaldesigner.net/uploads/1/3/0/9/130969421/sapusikaf.pdfIn PDF document text
    • http://sjcconsulting.org/uploads/1/3/0/6/130620678/fofopav.pdfIn PDF document text
    • http://myforestgarden.net/uploads/1/3/0/4/130435532/8293033.pdfIn PDF document text
    • http://cincigreyhounds.com/uploads/1/3/1/4/131453623/sunisawusosunerem.pdfIn PDF document text
    • http://repitoutfitness.com/uploads/1/3/0/2/130289411/dazipumezujigerotuge.pdfIn PDF document text
    • http://designbyraniallc.com/uploads/1/3/0/3/130323573/rumideneb.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
🗂 Part of campaign: prepaidhomedeductible.com 4 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D49 9696 bytes
SHA-256: 46178ff452e19c22345902770e01cee8935238c91fa5f5a403f6321366f436c1
font_01_sfnt_off0000c004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC004 4464 bytes
SHA-256: 77b14c826d90cef61f8144d3c001617c717edca88f39e1d880f5b36e07f685dd
font_02_sfnt_off0000d0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B0 16780 bytes
SHA-256: aa2aa33f4d582edfd6089923ed3848ea3b63090d5c454a6926c5a528ad22ae4e