Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a4489b3cbe7350…

MALICIOUS

PDF

41.3 KB Created: 2020-04-01 20:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: e76dd28787a20c1f6f0de3ffd5559e9f SHA-1: cd73f6a340622e5dde74afd0742b1b96f5ad1754 SHA-256: 02a4489b3cbe7350fd2862957239e03623712c868e01ceba02b530882e684977
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by an ML classifier as malicious. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic. The document body is heavily obfuscated and contains embedded URLs that point to various domains, likely serving as a lure or redirect to malicious content. No scripts were extracted, but the sheer volume of external links is highly suspicious.

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://huntingsusan.com/uploads/1/3/0/2/130287269/130287269.html#nombre+de+peces+de+agua+dulce+comestibles PDF link annotation
    • http://richardhoyen.com/uploads/1/3/0/7/130740046/e39793ea2c.pdfIn PDF document text
    • http://kissonthechicstyle.com/uploads/1/3/0/6/130621238/gewumexeva.pdfIn PDF document text
    • http://ascorabyggab.com/uploads/1/3/0/5/130589223/3668289.pdfIn PDF document text
    • http://withloveandhugs.com/uploads/1/3/1/0/131070847/nugixusan.pdfIn PDF document text
    • http://schooldietology.space/uploads/1/3/1/1/131163512/7426900.pdfIn PDF document text
    • http://nwsignworks.com/uploads/1/3/0/4/130476370/a17302b5ce.pdfIn PDF document text
    • http://poopremover.com/uploads/1/3/0/6/130621152/tuvesitaxuzumowi.pdfIn PDF document text
    • http://mccloytherapeutics.com/uploads/1/3/0/5/130540567/pazaduxozudotopewe.pdfIn PDF document text
    • http://rolloranch.com/uploads/1/3/0/5/130543813/vuzaxewevelodadax.pdfIn PDF document text
    • http://ironthong.com/uploads/1/3/0/5/130588294/xulitomenunivo_fadadefutemo.pdfIn PDF document text
    • http://metalgearraxa.com/uploads/1/3/0/4/130476255/lesugozopixigafag.pdfIn PDF document text
    • http://mail.garethmatthewscouture.com/uploads/1/3/0/4/130436040/14ae86e29d.pdfIn PDF document text
    • http://depann.net/uploads/1/3/0/6/130621309/2566257.pdfIn PDF document text
    • http://wgluxuryvacationrentals.com/uploads/1/3/0/2/130289161/dc9b8.pdfIn PDF document text
    • http://ghstgrl.com/uploads/1/3/0/4/130476242/dolexu-xavudevajuniwe.pdfIn PDF document text
    • http://newbodynormal.com/uploads/1/3/1/4/131408022/1977268.pdfIn PDF document text
    • http://thenaturalgoddess.com/uploads/1/3/0/7/130775893/72d14ff4.pdfIn PDF document text
    • http://andresbeatstore.com/uploads/1/3/0/6/130604980/fulalimorowiza.pdfIn PDF document text
    • http://possumrungreenhouse.com/uploads/1/3/0/5/130539497/fukurupidopa.pdfIn PDF document text
    • http://gustavrangmar.se/uploads/1/3/0/3/130323469/pilobodeziwofologufe.pdfIn PDF document text
    • http://assetrecoverylt.org/uploads/1/3/0/7/130775109/zusozopo.pdfIn PDF document text
    • http://dippedconfections.com/uploads/1/3/0/3/130323260/8536696.pdfIn PDF document text
    • http://www.ilcontadinodellumbria.com/uploads/1/3/0/5/130551351/nurolaxom-gapanov-liwefefuvewowik-mizovazax.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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077ef.bin
1f673c77a3f98a8e6d0aa910eacbcf5b70ff71c30e91e63de72e6ddbbd722ef1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77EF 8064 bytes

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