Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1746ca18bd21975…

MALICIOUS

PDF

41.1 KB Created: 2020-04-01 16:37:35 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 23f90a196d56f882ce8ed034a3886d0a SHA-1: e45bd7b97a3d866fa2a479cf0bc91f58ebe1f51a SHA-256: e1746ca18bd219755d5faa4a700f0705eef55c2ed98c3a592f5ff0760584218b
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO poisoning tactic. The document body, though partially corrupted, contains references to product names and application details, which are likely decoys to mask the malicious intent. The primary heuristic, PDF_SEO_LINK_FARM, indicates a high volume of outbound links designed to manipulate search engine results or direct users to potentially malicious content. The ML classifier also strongly flagged this PDF as malicious.

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://datanetguatemala.com/uploads/1/3/0/8/130873856/130873856.html#marcato+atlas+pasta+machine+model+150+prices
    • http://lchcs.com/uploads/1/3/0/5/130544243/matixixovepi.pdf
    • http://kanecountyautobody.com/uploads/1/3/0/5/130540037/1a05a72b1038.pdf
    • http://parkwayandoakwoodvistafinancing.com/uploads/1/3/1/3/131380160/066d9918458.pdf
    • http://k2c2creations.com/uploads/1/3/1/1/131163693/lesexezuje-noxak-defanotuxiton-piladotul.pdf
    • http://tinytentsau.com/uploads/1/3/0/6/130605324/768cdb215d.pdf
    • http://fireflyridgellc.com/uploads/1/3/1/4/131438127/pamewubazazibe.pdf
    • http://laikaacademy.com/uploads/1/3/0/6/130639446/semeriwifafad.pdf
    • http://mrgilladvice.com/uploads/1/3/0/7/130775448/745256.pdf
    • http://stagedoordanceacademy.net/uploads/1/3/0/9/130969243/7394504.pdf
    • http://resurrectionmuseum.com/uploads/1/3/0/6/130604240/texafagozu.pdf
    • http://tidytaxtools.com/uploads/1/3/0/6/130605040/71b35d8.pdf
    • http://theconservativerally.org/uploads/1/3/1/0/131071159/limonilobawanir.pdf
    • http://fromtheeditorsdeck.com/uploads/1/3/0/4/130477026/fibobadew_pubebabi.pdf
    • http://aniascards.com/uploads/1/3/0/6/130620708/nulozevuxumela.pdf
    • http://seattlesoccershop.com/uploads/1/3/0/5/130589122/gojafegafalefu.pdf
    • http://landafooddistrib.net/uploads/1/3/0/6/130604675/paxege_jufudosid.pdf
    • http://apushcode.com/uploads/1/3/0/4/130435988/zezubuvabuzu.pdf
    • http://millennialtraveleats.com/uploads/1/3/0/5/130543173/pejelixujar.pdf
    • http://venturaoceancenter.org/uploads/1/3/0/6/130639226/vosed-jegunojib.pdf
    • http://amberjavancecounseling.com/uploads/1/3/0/4/130477829/xuwigubevavejuwogopo.pdf
    • http://graystoneequitypartners.com/uploads/1/3/0/7/130738619/zipuratomifemisadu.pdf
    • http://waylong.org/uploads/1/3/0/7/130776561/wogiwip.pdf
    • http://imaginationandcreativityjuana.com/uploads/1/3/1/0/131069738/kiguta_pofukilutid_gixuvafuvenoz_milofigesi.pdf
    • http://imaginationandcreativityjuana.com/uploads/1/3/1/0/131069738/kiguta_pofukilut
    • 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_off0000771f.bin
b089a9d735fe951ef98e582ad91376a7b3d714f025b7436e70f407eee0d4a0ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x771F 8104 bytes

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