Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e64912fd745aad…

MALICIOUS

PDF

39.0 KB Created: 2020-03-22 13:45:14 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: a197bb68b9b39895198218e34c1b438d SHA-1: 295655516827d41910fcb7ec3e120e2f5519c934 SHA-256: b1e64912fd745aadd24a45eca50aff3c4eaf0920bec597ac7debc99b9e918642
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, a technique often used for SEO poisoning or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the PDF structure and numerous external links suggest a content-luring or redirection attack. The document body contains garbled text and a URL, further supporting the redirection hypothesis.

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://allison-arnold.com/uploads/1/3/0/6/130603917/130603917.html#love+conjugacion+en+pasado+simple+ingles PDF link annotation
    • http://runwildandbe.com/uploads/1/3/0/5/130540461/vegimitejo.pdfIn PDF document text
    • http://avamgarde.com/uploads/1/3/0/6/130639883/nirolixilekerefem.pdfIn PDF document text
    • http://mindbodymend.com.au/uploads/1/3/0/6/130621852/823007.pdfIn PDF document text
    • http://hta2.com/uploads/1/3/0/4/130488241/gatisitozeg-radufoba.pdfIn PDF document text
    • http://compassionatecupid.com/uploads/1/3/0/9/130969714/51e3c43b75.pdfIn PDF document text
    • http://annssweets.com/uploads/1/3/0/7/130776661/nufibozisiwov.pdfIn PDF document text
    • http://hunterslanefarm.com/uploads/1/3/0/6/130605381/juxagejagewa.pdfIn PDF document text
    • http://corollalightbeachhouse.com/uploads/1/3/0/6/130620375/vamafele.pdfIn PDF document text
    • http://globalhumax-dmaxcard.com/uploads/1/3/0/2/130288444/52487c43367e.pdfIn PDF document text
    • http://aiasciencemagazine.com/uploads/1/3/0/4/130489997/2374643.pdfIn PDF document text
    • http://pauleast.net/uploads/1/3/0/3/130379912/0ea600.pdfIn PDF document text
    • http://hellomilesandpace.com/uploads/1/3/0/8/130874162/164920aa223.pdfIn PDF document text
    • http://www.kohicorgi.com/uploads/1/3/1/0/131070240/kuvezasulaxuva.pdfIn PDF document text
    • http://organictherapeuticbodywork.com/uploads/1/3/0/8/130814122/pibeduwalenijori.pdfIn PDF document text
    • http://oelifestyle.com/uploads/1/3/0/8/130874204/a6bd13af47.pdfIn PDF document text
    • http://activopulse.com/uploads/1/3/0/5/130588475/4639146.pdfIn PDF document text
    • http://tammystastytreats.net/uploads/1/3/0/7/130775598/dejegixare-gitikapizopudu-tosiguwal.pdfIn PDF document text
    • http://jpaulllc.net/uploads/1/3/0/4/130436513/c8b2dd312ce594.pdfIn PDF document text
    • http://be-your-best.dk/uploads/1/3/0/3/130313167/f1eca9c.pdfIn PDF document text
    • http://www.kristendellapace.com/uploads/1/3/0/2/130288932/947485.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 1

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_off000070c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C9 8492 bytes
SHA-256: 90f07067751fcc9e6d9f17e05ce2c792ef573453dd2488c06a886369b9d0416d

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