Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a805c1be7b396db…

MALICIOUS

PDF

75.3 KB Created: 2021-03-28 21:12:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: fab0ad7a32f345d30e5a70756ccaa5a7 SHA-1: b054391877a9192162401c3db85eb81224ef1ad2 SHA-256: 1a805c1be7b396db687ca9a527a22389d7507edf97094d96bf795d5031387194
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malware or phish for information. The primary URL, 'https://golowaki.ru/strik?utm_term=download+realtek+high+definition+audio+driver+for+windows+xp+professional', is presented as a driver download, a common lure for users seeking specific software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/strik?utm_term=download+realtek+high+definition+audio+driver+for+windows+xp+professional PDF link annotation
    • https://cdn.sqhk.co/dijogiper/kPvhjih/stickman_street_fighter_stick_fight_wars.pdfIn PDF document text
    • http://jajuviramigawo.medianewsonline.com/38328819359.pdfIn PDF document text
    • https://cdn.sqhk.co/togokitaz/Eosjib0/mizegoduta.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482870/normal_5fe4c73957d31.pdfIn PDF document text
    • http://sizuxofutitarax.mypressonline.com/kosixelowekolegudonapeti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477400/normal_6048722c17210.pdfIn PDF document text
    • https://cdn.sqhk.co/dilobowuz/eFOE97S/ping_pong_rules_singles_serving.pdfIn PDF document text
    • https://cdn.sqhk.co/lunapolakezo/geBGEDP/auto_chess_war_mod_diamond.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486374/normal_5fc7fe63ad7ee.pdfIn PDF document text
    • https://cdn.sqhk.co/zevijevam/icjjjg0/sijerejolunosiluzofeka.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/via7gcs/4867884610.pdfIn PDF document text
    • http://gejulavofanutar.mygamesonline.org/is_google_maps_or_apple_maps_better.pdfIn PDF document text
    • https://cdn.sqhk.co/fitodofafe/wjdwn2Y/evidence_based_medicine_book.pdfIn PDF document text
    • http://sesizuxewewax.mygamesonline.org/fedex_locations_elkins_wv.pdfIn PDF document text
    • http://faponabon.mygamesonline.org/jamudevaboluwisos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481684/normal_5fe73d0bef978.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1d942ef5-affb-47d8-8f99-70a3d187b733.filesusr.com/ugd/3283b0_3f9ff1f1dffb4b7bbbc13716acbf6c54.pdf?index=trueIn PDF document text
    • http://gutekuretejapoj.onlinewebshop.net/xusexijikifefagowe.pdfIn PDF document text
    • https://034618a9-9b39-4f41-ad18-95bca1d1c80b.filesusr.com/ugd/48d9a1_ebd7006faead4f53aeddc70845c84942.pdf?index=trueIn 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_off0000e9e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E0 5584 bytes
SHA-256: 8d17965e5218d795a4f4f4519eeda8ad758172bd1f1dd5706dd4e3b3a669736d
font_01_sfnt_off0000fd10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD10 10012 bytes
SHA-256: 4995617049478da58d5e8a4b869825ca067689968d7c3fcfbf0cb1de7e314b5c

Open this report in the interactive analyzer, or submit your own file for analysis.