Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c08ff3dd712064e…

MALICIOUS

PDF

79.0 KB Created: 2021-03-15 20:59:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 72533e29ba0459ddd8d68fe6d3cbc7ad SHA-1: 94aa08eb7b6601674240fdb1d1b7efeb449a93ac SHA-256: 2c08ff3dd712064e87f07b625306727ad7cb53d1557ff49b2b34f90d0e265f84
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://crophysi.ru/wix?keyword=hitachi+c10rj+zero+clearance+insert PDF link annotation
    • https://gewolurigidanax.weebly.com/uploads/1/3/1/3/131383018/931ff215f000.pdfIn PDF document text
    • https://cdn.sqhk.co/perekowemo/ggee7ij/subway_scooters_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuzivo/IYKiaqF/17342259402.pdfIn PDF document text
    • https://cdn.sqhk.co/gikunixa/h9vhjjh/tropico_6_economy_tips.pdfIn PDF document text
    • https://nobarolibefo.weebly.com/uploads/1/3/1/4/131407117/46fd87757b696.pdfIn PDF document text
    • https://zaduguwage.weebly.com/uploads/1/3/0/8/130874015/dewibokidunilig-nuguwegarotapem-tavud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424361/normal_5fd979c27fcf5.pdfIn PDF document text
    • https://cdn.sqhk.co/zepagaro/eghjcnJ/firaguxilopexelubozeluwut.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/40148893763.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410004/normal_6029ca8e32b09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426407/normal_5feec4d76e9e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367650/normal_60288d8f3706c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452862/normal_5ff14a91de8b7.pdfIn PDF document text
    • https://wikiredapitij.weebly.com/uploads/1/3/2/7/132712416/pakuzaz.pdfIn PDF document text
    • https://cdn.sqhk.co/xinefegepe/bjeVWVj/incivility_in_nursing_essay.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sudexixurijaxoz.atwebpages.com/10107810329.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/gisekefe.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/betternet_free_vpn_android.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/odia_song_video_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/disukuzaxot.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/sivonowirudaxowesof.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/ap_psychology_exam.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/craftsman_3-stage_snow_blower_with_272_cc_engine_-_24-in_reviews.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CA 5168 bytes
SHA-256: 56ddaf631ae2284bc36e883a4b9835deb483fb6fe8024556f49feeaf8682e643
font_01_sfnt_off00010862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10862 11308 bytes
SHA-256: 20571608cc74345220388b9205c88e13cfbbc9b4e8a7b9d57407708a94c444e4

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