Malicious PDF — malware analysis report

Static analysis result for SHA-256 88577e119f4190ce…

MALICIOUS

PDF

59.5 KB Created: 2020-05-22 14:08:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 44b1dcc1efc0fc10dd4ef19c5fbb562e SHA-1: a2a517f96c221770692ec192be0da6ea57eb0a42 SHA-256: 88577e119f4190cea2c393e964ade34f478fbcc35b719d763546c967e577b446
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a mechanism to distribute additional malicious content. The ML classifier strongly supports the malicious verdict, and the presence of numerous external URLs suggests an attempt to manipulate search engine results or redirect users to potentially harmful sites.

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://blackdampbrewing.com/uploads/1/3/1/6/131637876/131637876.html#libro+fundamentos+de+investigacion+p PDF link annotation
    • http://wpleli.com/uploads/1/3/1/4/131437980/388e232088d532.pdfIn PDF document text
    • http://cprratemate.com/uploads/1/3/1/3/131384599/3691085.pdfIn PDF document text
    • http://barkinthepark.info/uploads/1/3/1/8/131857252/zeraturegexejiwuzeja.pdfIn PDF document text
    • http://webdisk.freshskintattoos.com/uploads/1/3/0/5/130545636/rexafu_ketewijo_setobetox_voxix.pdfIn PDF document text
    • http://ibcglobal-japan.com/uploads/1/3/1/4/131454500/jikudozige_pexudanok_pimipoxu_lajenoj.pdfIn PDF document text
    • http://edspeakers.com/uploads/1/3/0/7/130739377/renit.pdfIn PDF document text
    • http://barquinsleaders.com/uploads/1/3/0/3/130323116/bojodevusudopi_pudadabadodo.pdfIn PDF document text
    • http://worksbyfaith.net/uploads/1/3/0/7/130739553/3954462.pdfIn PDF document text
    • http://andtheylivedhappilyeverafter.com/uploads/1/3/1/4/131406708/kaxufowifup_tapaxarewitajuk_tawoxazeb.pdfIn PDF document text
    • http://ourgreenlittlevillage.com/uploads/1/3/0/6/130621393/damuz.pdfIn PDF document text
    • http://enwranch.com/uploads/1/3/0/8/130814676/kefejunoji-ledolinamuwiw-nilij.pdfIn PDF document text
    • http://neurogs.com/uploads/1/3/0/6/130604388/musumuberoregogatate.pdfIn PDF document text
    • http://martinestowers.com/uploads/1/3/0/6/130620557/mobejukelodalos-rokokavivo-kiwulibivimepim.pdfIn PDF document text
    • http://dobiehills.com/uploads/1/3/1/3/131379268/87a3d2470b587.pdfIn PDF document text
    • http://mygirlsapparel.com/uploads/1/3/1/6/131637701/7921674.pdfIn PDF document text
    • http://abidingsaviortx.org/uploads/1/3/0/3/130323647/vedimukogaf-maxasez-jaripux.pdfIn PDF document text
    • http://ravenstede.com/uploads/1/3/0/5/130589297/dapowaw_faxevuzuxid_vevopugebev.pdfIn PDF document text
    • http://acupforthecause.com/uploads/1/3/1/6/131606123/cde91cd.pdfIn PDF document text
    • http://susanaborosic.com/uploads/1/3/1/4/131437341/dowodafolamamix_murarifijixa_wekofi_foporiwiwazi.pdfIn PDF document text
    • http://chefpapinyc.com/uploads/1/3/1/4/131408159/kisojudo-famibowolavivi-novotomedazeluk.pdfIn PDF document text
    • http://healthychioceforlife.net/uploads/1/3/0/6/130604220/duwuzagerazunupisew.pdfIn PDF document text
    • http://stjeromehomeschoollibrary.org/uploads/1/3/0/6/130621397/zinelidubego.pdfIn PDF document text
    • http://ndsportschannel.net/uploads/1/3/0/6/130621349/getususopi.pdfIn PDF document text
    • http://sabahhomestaykualapenyu.com/uploads/1/3/0/6/130639317/5532961.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 4

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_off0000b758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB758 13760 bytes
SHA-256: 633d84764f93361d5ec328739de5676f251a91b76100b70fb20fe672aea9902a

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