Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec9d91d4716bf279…

MALICIOUS

PDF

44.3 KB Created: 2020-03-29 14:04:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 3c72a578e6536457072d5fe38d9c2845 SHA-1: ca0f48301642e4a57bed0ddf4f4e82c679afe42a SHA-256: ec9d91d4716bf279b8d03de8f49b558d228fc54f58be7d5eafd614a0a006ebc4
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, indicating a potential attempt to distribute further malware or engage in phishing. The document body itself contains a title related to media importance, but this appears to be a lure, with the primary malicious activity being the extensive link farm.

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://74-123-75-199.mgwnet.com/uploads/1/3/0/6/130604117/130604117.html#importancia+de+los+medios+de+comunicacion+en+el+aprendizaje PDF link annotation
    • http://lovehardlaughoften.com/uploads/1/3/0/6/130604391/679dc.pdfIn PDF document text
    • http://dt-resume.com/uploads/1/3/0/5/130588493/rodunorubarabumi.pdfIn PDF document text
    • http://cpgrecruiter.com/uploads/1/3/0/4/130435619/7394f.pdfIn PDF document text
    • http://lakeoswegobass.com/uploads/1/3/0/4/130478163/vuvofoborutumu_garomamubanerit_tepuj_dameju.pdfIn PDF document text
    • http://skycampgreenwich.org/uploads/1/3/0/8/130814337/xalisujemomedewise.pdfIn PDF document text
    • http://mojoactionsports.com/uploads/1/3/0/6/130604931/mojotonijodusure.pdfIn PDF document text
    • http://techfast.net/uploads/1/3/0/8/130813757/lutarikit_gewenofuxi.pdfIn PDF document text
    • http://jackshacks.co/uploads/1/3/0/7/130740195/b974134bf14bd.pdfIn PDF document text
    • http://group15project.com/uploads/1/3/0/8/130874287/2905179.pdfIn PDF document text
    • http://atlanticblueaquaculture.com/uploads/1/3/0/7/130740140/300044.pdfIn PDF document text
    • http://haileymorey.com/uploads/1/3/0/7/130739626/91d8eb4223fb598.pdfIn PDF document text
    • http://supportcherokeecounty.com/uploads/1/3/0/7/130739723/5615371.pdfIn PDF document text
    • http://madreadscomics.com/uploads/1/3/0/5/130546354/nuvijetovoj.pdfIn PDF document text
    • http://evandlambert.com/uploads/1/3/0/7/130740344/9d5940ebe.pdfIn PDF document text
    • http://sacyapi.com/uploads/1/3/0/5/130551174/7021867.pdfIn PDF document text
    • http://kirstenwheeleryoga.com/uploads/1/3/0/6/130639312/rajapetaza_zusatu_rojupupor_demaluzejoz.pdfIn PDF document text
    • http://dcfamilytours.com/uploads/1/3/0/8/130813364/287515.pdfIn PDF document text
    • http://elemensis-distribution.com/uploads/1/3/0/6/130620737/4cb82b964bdae6.pdfIn PDF document text
    • http://indianlakeoutpost.com/uploads/1/3/0/5/130539798/274f052317.pdfIn PDF document text
    • http://calendarservicesma.com/uploads/1/3/0/8/130874384/e5615e2e57532.pdfIn PDF document text
    • http://flyonaviation.com/uploads/1/3/0/6/130621431/765521.pdfIn PDF document text
    • http://clarkcountyisnotforsale.com/uploads/1/3/0/4/130476242/8828940.pdfIn PDF document text
    • http://kimrichardsart.com/uploads/1/3/0/7/130776640/12fd737f75a2232.pdfIn PDF document text
    • http://nancyjmiller.net/uploads/1/3/1/1/131163872/tulupegosi.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_off00008196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8196 8592 bytes
SHA-256: 1f84098cccf069ef73575b27e4ae6522098d650169f6d680c7ff2333b7c1c0a4

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