Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e97fbb274d2b88c…

MALICIOUS

PDF

33.8 KB Created: 2020-03-15 03:25:08 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 0732343d772f77129b93157e80ca86a6 SHA-1: 6bf4323cd64af92e656183a25338665345742c0f SHA-256: 8e97fbb274d2b88c515efbdb64a5d5255dd65bb86d4b3f3a3c9f0abf89c798cc
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links to various domains, indicating a link farm or SEO spamming operation. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://5azdic.salon225.com/uploads/1/3/0/2/130274315/130274315.html#telefonos+android+baratos+mercadolibre PDF link annotation
    • http://ageniart.com.au/uploads/1/3/0/2/130273584/5252815.pdfIn PDF document text
    • http://thriveandnourish.com/uploads/1/3/0/8/130873894/4963783.pdfIn PDF document text
    • http://www.stewarthealthresourcesolutions.com/uploads/1/3/0/5/130545278/fanevi-vofut-vejuven.pdfIn PDF document text
    • http://difficultrunponyclub.org/uploads/1/3/0/5/130590457/3615546.pdfIn PDF document text
    • http://superselections.net/uploads/1/3/0/6/130640183/5363264.pdfIn PDF document text
    • http://netmassive.net/uploads/1/3/0/5/130550874/pevuxe.pdfIn PDF document text
    • http://yourmateapparel.com/uploads/1/3/0/4/130476984/vojijofenipexox.pdfIn PDF document text
    • http://quirk.solutions/uploads/1/3/0/2/130272250/9163252.pdfIn PDF document text
    • http://www.catholicchurchofantioch.net/uploads/1/3/0/5/130540134/tuzab.pdfIn PDF document text
    • http://creationsbyclaudia.com/uploads/1/3/0/5/130589435/rimutinegeje.pdfIn PDF document text
    • http://www.chlaudit.com/uploads/1/3/0/7/130776298/xunokedo.pdfIn PDF document text
    • http://contractorwholesale.com/uploads/1/3/0/6/130639811/satuz.pdfIn PDF document text
    • http://texasconstructionpro.com/uploads/1/3/0/5/130590682/2ac5485c25e.pdfIn PDF document text
    • http://igniteyourinnerhero.com/uploads/1/3/0/6/130621317/2047771.pdfIn PDF document text
    • http://beadsbytrokon.com/uploads/1/3/0/6/130621044/jotodige.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_off00005b47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B47 7648 bytes
SHA-256: 40164cd42c0ae692bb038afa0ce92e6643cb39707c8a6d6caf0702d2e8fa05ad

Open this report in the interactive analyzer, or submit your own file for analysis.