Malicious PDF — malware analysis report

Static analysis result for SHA-256 3603413d9269ce9a…

MALICIOUS

PDF

39.6 KB Created: 2020-05-25 04:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 106c8d92bbc5b23f7b38c7bf1da3e008 SHA-1: b32e0c40341465f1fb3e174f37f3154e75332220 SHA-256: 3603413d9269ce9a19a91fd1fdd78cc56f0c9c3c6d256b5f277a49c7b48e8f4c
94 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 to other PDF files hosted across numerous domains. This behavior is indicative of a link farm or SEO spam campaign, which can be used to distribute malware or engage in phishing. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine a more specific attack pattern beyond link distribution.

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://flippedoutscience.net/uploads/1/3/1/0/131071262/131071262.html#pokemon+fire+red+emulator+mew+cheat
    • http://jtmproperty.com/uploads/1/3/0/6/130639719/wedurofovilelizakop.pdf
    • http://otomemika.com/uploads/1/3/1/3/131384544/forulagojovo.pdf
    • http://live-mapping.com/uploads/1/3/0/6/130620755/lakepasal.pdf
    • http://commercialairductscleaning.com/uploads/1/3/0/6/130604945/nagimaruvef-karexoderen.pdf
    • http://scahistoricalsociety.com/uploads/1/3/1/4/131453288/10c45b00.pdf
    • http://treatsmn.shop/uploads/1/3/0/6/130639851/6298f802655b553.pdf
    • http://discountsatan.com/uploads/1/3/0/6/130639533/6354160b701dc.pdf
    • http://showandpetessentials.com/uploads/1/3/1/3/131384407/wigoxikuzup_zovuku.pdf
    • http://lovefestdorset.ca/uploads/1/3/0/5/130550967/daxawi.pdf
    • http://greengateschoolcabo.com/uploads/1/3/1/3/131384688/48eeb3d737.pdf
    • http://prola.org/uploads/1/3/0/6/130639082/1775184.pdf
    • http://luvsbirds.com/uploads/1/3/0/6/130620747/sibefa.pdf
    • http://elkrockeventcenter.com/uploads/1/3/0/2/130271076/c8ba5a.pdf
    • http://dfscbanquet2018.com/uploads/1/3/0/7/130739811/lizewam_papafote_rovojusefuxamo.pdf
    • http://hellobeautifulconroe.com/uploads/1/3/0/5/130539287/bopapegirunuma-zisulubudij.pdf
    • http://islanddukkha.com/uploads/1/3/0/5/130543766/dapazolokilejawusudo.pdf
    • http://totallytoteabletotes.net/uploads/1/3/0/9/130969989/86afe7325.pdf
    • http://mkh-mfg.com/uploads/1/3/0/4/130483153/1613106.pdf
    • http://martinezlandscape.org/uploads/1/3/1/1/131164020/849abbda.pdf
    • http://kevinandhell.com/uploads/1/3/0/3/130323674/nevirozokodogir-wafufutemi-gugexuboxakawa.pdf
    • http://webmail.mandelnewman.com/uploads/1/3/0/4/130476229/d1c79310424d6.pdf
    • http://tier1sexoffenders.com/uploads/1/3/1/4/131438874/9091556.pdf
    • http://navigatebetween.me/uploads/1/3/1/4/131454536/a8f25d7c018d.pdf
    • http://wholesomefarmersmarket.com/uploads/1/3/1/4/131410434/rudebe.pdf
    • http://basementfinishingomaha.com/uploads/1/3/1/3/131384301/solipe.pdf
    • http://basementfinishingomaha.com/uploads/1/3/1/3/131384301/solipe
    • 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_off00006e5c.bin
1ab4c1ba5436e3a11dcd36db39eb37c40e5bc1b543b4279d84b95ae353ce0adf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5C 10524 bytes

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