Malicious PDF — malware analysis report

Static analysis result for SHA-256 569c9c4b5816fe8f…

MALICIOUS

PDF

72.3 KB Created: 2021-01-20 17:23:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 1814613df2d91c9cb21aaca0f8de603c SHA-1: b6e08289f9169cd2b6f0db6c7a969a6abf332bae SHA-256: 569c9c4b5816fe8f08e4fc984075492913091c264dd3044052c9950190aa11c0
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a large number of embedded links, many of which point to external PDF files, indicating a link farm or redirection strategy. Several heuristics confirm the malicious nature, including a critical finding of a PDF redirector link to `https://yafferge.ru/123?utm_term=multi+way+bra+instructions` and a PDF SEO link farm. The ML classifier and ClamAV detection further support the malicious verdict. No scripts were extracted, but the extensive use of external links suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=multi+way+bra+instructions In PDF document text
    • http://negeduji.66ghz.com/fortnitemares_challenges_cheat_sheet_part_3.pdfIn PDF document text
    • https://nivujetomut.weebly.com/uploads/1/3/4/7/134753784/fc6655ff87caf.pdfIn PDF document text
    • https://xasirazabad.weebly.com/uploads/1/3/4/6/134699738/5818522.pdfIn PDF document text
    • https://zakuxaposud.weebly.com/uploads/1/3/1/3/131382531/ac33e5.pdfIn PDF document text
    • http://salukapebuke.iblogger.org/gooners_guide_world_cup.pdfIn PDF document text
    • https://site-1254643.mozfiles.com/files/1254643/calendario_2019_octubre.pdfIn PDF document text
    • https://zabodoxukuxubar.weebly.com/uploads/1/3/4/9/134904472/fomavituvozasa-woforanarepiwo.pdfIn PDF document text
    • https://site-1172308.mozfiles.com/files/1172308/gacha_club_oc_ideas_girl.pdfIn PDF document text
    • https://site-1262069.mozfiles.com/files/1262069/documentum_administrator_guide_7__2.pdfIn PDF document text
    • https://site-1197012.mozfiles.com/files/1197012/judge_batten_northern_district_of_georgia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gupojakami/48519155307.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/sisum.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/51231502182.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/bolt_and_nut_drawing.pdfIn PDF document text
    • http://femavumifixomud.rf.gd/62197698421.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/sunadagixa.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/12563201100.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/ameda_manual_breast_pump_reviews.pdfIn PDF document text
    • http://vurisadazuxe.epizy.com/gangster_bollywood_movie_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/wunevolivamemija.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/bajovotisapixogolupimusi.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2E 5132 bytes
SHA-256: 1763056625d2c30acad41cfeb997314eba08cc026c17844ac25a97040f129055
font_01_sfnt_off0000efd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD8 10608 bytes
SHA-256: c9df07c976d75b096a843c39c1fc086a0719277ad68ee83ecbdb92eeca3c765a

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