Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cc8c92ee3b27a7b…

MALICIOUS

PDF

52.9 KB Created: 2020-03-29 21:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e39b276dd6700cbd6e743ab3e031a582 SHA-1: 86001434700b800f0f276fde67088e3b7220ea19 SHA-256: 1cc8c92ee3b27a7b079816be9c0dcccf1470980ec08a59fb7937149448b81793
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm or a mechanism to distribute malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs suggests a coordinated effort to redirect users to potentially harmful sites. No scripts were extracted, but the structure and heuristics point towards a delivery or redirection mechanism.

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://74-123-76-48.mgwnet.com/uploads/1/3/1/4/131453565/131453565.html#funciones+del+cuerpo+humano+para+ni%C3%B1os+de+preescolar
    • http://ontheballfootballacademy.com/uploads/1/3/1/0/131070867/2246255.pdf
    • http://hayfordmarketingtest.com/uploads/1/3/0/6/130639453/sixatimu-xatolutipoku.pdf
    • http://testrock.net/uploads/1/3/1/3/131380288/c83c4d8b.pdf
    • http://shopthesilvermine.com/uploads/1/3/0/3/130323295/dutojowufodepu-xapewoposapux.pdf
    • http://aztruemotorz.com/uploads/1/3/0/4/130476317/2b5a4aa1f.pdf
    • http://patchel.net/uploads/1/3/0/7/130739073/98ee688b764fb.pdf
    • http://skincarebytaylor.info/uploads/1/3/0/2/130287943/popeka.pdf
    • http://softhavenleggings.com/uploads/1/3/1/1/131164394/dfe77f18.pdf
    • http://washingtonparkfamilyinsurance.com/uploads/1/3/0/4/130436050/polifejed_nujotapuweke_bewitek.pdf
    • http://therestaurantfixer.com/uploads/1/3/0/7/130775759/resebipejodur-fusara-luzavuribesejiw-levejaxutebe.pdf
    • http://27waterfallsiguanamama.com/uploads/1/3/0/5/130589161/kavijona.pdf
    • http://kyokushinkanaustralia.com/uploads/1/3/1/0/131071277/bulakajenubikepip.pdf
    • http://phenomenalwigsandextensions.com/uploads/1/3/0/4/130490399/c1b9e09b128.pdf
    • http://smalltalkchesco.com/uploads/1/3/0/8/130815008/tiwajituguni_pejopota.pdf
    • http://hausoftracy.com/uploads/1/3/0/7/130738652/884829.pdf
    • http://erewhonferm.com/uploads/1/3/0/2/130272580/482a3062cbf2f.pdf
    • http://nevermoreacrespetrescueinc.com/uploads/1/3/0/8/130874474/xogafogowaxamuz.pdf
    • http://integritycontractingkcmo.com/uploads/1/3/1/1/131164266/kafelamudixe.pdf
    • http://bestofliferoofs.com/uploads/1/3/0/6/130620668/vapune_tuzim_kapopemegas.pdf
    • http://aseemsice.com/uploads/1/3/0/2/130288506/rowelidexelijul.pdf
    • http://casinoonlineaustralia.com/uploads/1/3/0/5/130539309/fa7755da1.pdf
    • http://sweetjarcreations.com/uploads/1/3/0/7/130776617/livano-mudam-kuzuzulon-zujelowevazazu.pdf
    • http://adujaani.ee/uploads/1/3/0/4/130484005/5f2145fae9a203b.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a05d.bin
f8cc31d8114edba819f128f9b781262cc9a38801c6f4c3e86062e6676ad3dc48		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA05D 9636 bytes

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