Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e95f1db22716c94…

MALICIOUS

PDF

73.1 KB Created: 2020-12-23 15:21:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 746bb6573930368c5a00b0bd426dddc7 SHA-1: 10de435c879fa70a6c74dc54762530a814921601 SHA-256: 8e95f1db22716c94f3b477c98238029ca356884c9fcc96bbd8280655295f4b8d
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. It contains a large number of external links, suggesting a link farm or SEO spam tactic. The primary URL, 'https://traffset.ru/strik?utm_term=how+do+granny+smith+apples+taste', appears to be the lure, disguised as a search result. No scripts were extracted, but the PDF structure and extensive linking are indicative of a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffset.ru/strik?utm_term=how+do+granny+smith+apples+taste
    • https://rasozonikazip.weebly.com/uploads/1/3/4/9/134904665/fifanuvepo.pdf
    • https://didowivukosu.weebly.com/uploads/1/3/4/4/134470318/vodagakapifa.pdf
    • https://cdn-cms.f-static.net/uploads/4465691/normal_5fb2f4d7e8ca2.pdf
    • https://topifovav.weebly.com/uploads/1/3/4/5/134595147/7254159.pdf
    • https://sapilijufidukuw.weebly.com/uploads/1/3/4/9/134901451/7346127.pdf
    • https://jafadunew.weebly.com/uploads/1/3/4/6/134632108/479698.pdf
    • https://static.s123-cdn-static.com/uploads/4369776/normal_5fcbb0487eb7d.pdf
    • https://cdn-cms.f-static.net/uploads/4443342/normal_5fb88fcd42790.pdf
    • https://cdn-cms.f-static.net/uploads/4489428/normal_5faa0fc12e476.pdf
    • https://pevusipifo.weebly.com/uploads/1/3/4/8/134863194/pinoxob-joxire-ribekadezuti-weseloxufej.pdf
    • https://zugasunisozabij.weebly.com/uploads/1/3/4/7/134759734/7180578.pdf
    • https://xelemurefitarag.weebly.com/uploads/1/3/4/6/134601467/07200121ba2.pdf
    • https://sofowalomutupal.weebly.com/uploads/1/3/4/3/134310420/sipozadupifowuleza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/ropuba/bill_payable_in_balance_sheet.pdf
    • https://s3.amazonaws.com/jajoxulabojaso/65314374928.pdf
    • https://uploads.strikinglycdn.com/files/ab92f106-b2ca-4883-ae63-ddb9fae348a7/atomic_structure_packet_answers.pdf
    • https://s3.amazonaws.com/lezopobigeza/nightcore_video_maker_apk.pdf
    • https://s3.amazonaws.com/viromibukoleliw/83108722984.pdf
    • https://s3.amazonaws.com/fekaduvopigab/10191567200.pdf
    • https://s3.amazonaws.com/faluzotixupi/st_dorothy_s_church_glendora_ca.pdf
    • https://uploads.strikinglycdn.com/files/27b0871c-c1f6-4946-ab80-4e9a9b743b02/star_platinum_the_world_sound_effect.pdf
    • https://s3.amazonaws.com/wesezuzuvalirik/5911458433.pdf
    • https://s3.amazonaws.com/jamokaroxoj/82062135120.pdf
    • https://s3.amazonaws.com/jujadodedaruxix/5186122688.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e087.bin
93d164af726663be10aae4d4b192bd770371699f56ab45e958b4e7749ce932b1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE087 5528 bytes
font_01_sfnt_off0000f33d.bin
2a8cdebd17e0be2fa95d6244dc222149421dc2bd7073714823550c076a5c894d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF33D 10404 bytes