Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0ac16844523254…

MALICIOUS

PDF

31.3 KB Created: 2020-05-24 01:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: b637256da5566da3733044dae454cdf9 SHA-1: 142bdd9fa33ee43fd3cc98bfdd2c9c81b2c71b03 SHA-256: cc0ac168445232547db8fc8a4f841080f2ccb8cee2726ce38aa0dfe7e2b7cd9e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF document exhibits characteristics of a link farm or SEO spam, containing a large number of external links to various domains. The primary heuristic, PDF_SEO_LINK_FARM, indicates a mass of external PDF links, suggesting a coordinated effort to manipulate search engine results or redirect users to potentially malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample, limiting the ability to determine a specific payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://luluchics.com/uploads/1/3/0/5/130544781/130544781.html#lasko+heater+ct30710+manual PDF link annotation
    • http://slowve.org/uploads/1/3/0/2/130287738/zodokadun.pdfIn PDF document text
    • http://mail.toyislepawleys.com/uploads/1/3/1/4/131438163/ba40c24ee337.pdfIn PDF document text
    • http://tatefincher.com/uploads/1/3/0/5/130588784/kesewilo.pdfIn PDF document text
    • http://forgecottagebarn.co.uk/uploads/1/3/1/4/131406939/6218737.pdfIn PDF document text
    • http://delestablo.com/uploads/1/3/0/3/130323612/gupipomo.pdfIn PDF document text
    • http://swiftvideo.com/uploads/1/3/1/8/131856435/logefigadikoxup-rabugitufepituf-xoxowubiti.pdfIn PDF document text
    • http://skincarerewards.com/uploads/1/3/0/6/130639705/gisenovipuga.pdfIn PDF document text
    • http://thehandmadehydrangea.com/uploads/1/3/1/3/131398084/rukajatuko.pdfIn PDF document text
    • http://designandconquerhomes.com/uploads/1/3/1/6/131637362/9917692.pdfIn PDF document text
    • http://lifeofripe.com/uploads/1/3/0/6/130604263/kiwevi-fasan-mekupore.pdfIn PDF document text
    • http://seatfox.org/uploads/1/3/0/9/130969801/cb2d52572e790.pdfIn PDF document text
    • http://pmenvironmental.org/uploads/1/3/0/4/130488604/c0b8161a.pdfIn PDF document text
    • http://server65294.misscarols.com/uploads/1/3/0/5/130588461/90cbfa.pdfIn PDF document text
    • http://nailigraphy.com/uploads/1/3/0/3/130379528/356266.pdfIn PDF document text
    • http://sarahpalette.com/uploads/1/3/1/4/131454352/xamomifuwedenif.pdfIn PDF document text
    • http://vadeferias.com/uploads/1/3/0/5/130539085/8489597.pdfIn PDF document text
    • http://xv.undesirable.us/uploads/1/3/0/6/130640088/vupozusup_lonexu.pdfIn PDF document text
    • http://boatletteringcleveland.com/uploads/1/3/1/8/131856076/6a6fb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Related samples 3

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_off0000505f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x505F 9768 bytes
SHA-256: a211ec78e6eee197cdde796f3eb1a9054c7658bfc9f6611c73f14c3694ffc35e

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