Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8c154c974ff752f…

MALICIOUS

PDF

85.6 KB Created: 2021-02-22 13:59:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 10cf5b4b35edb1534bdc3528e02543bc SHA-1: d15bb85d1c0c54395bd6a66218519c9f6e2c29db SHA-256: e8c154c974ff752f82997997aa4eda65793262045d6f6103d2bda16eff131793
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which are hosted on disposable domains or redirectors, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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.
  • 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/strik?utm_term=how+to+identify+my+old+singer+sewing+machine In PDF document text
    • http://1s.london/what_is_the_primary_purpose_of_international_literaturebl43a.pdfIn PDF document text
    • http://xsale.trade/reading_and_writing_3qjkw8.pdfIn PDF document text
    • https://ketafimevudo.weebly.com/uploads/1/3/1/6/131637081/paleko.pdfIn PDF document text
    • http://help-mediasupport.com/rambo_special_night_koln3nmup.pdfIn PDF document text
    • https://cdn.sqhk.co/bomumuxa/fyNn3ja/61284762718.pdfIn PDF document text
    • http://mattelipsticks.site/befevadaxijaxovuzdzie1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414682/normal_5febc1903a9d2.pdfIn PDF document text
    • https://cdn.sqhk.co/dowusutitozi/AnjahiF/btools_business_model_canvas_apple_music.pdfIn PDF document text
    • https://cdn.sqhk.co/voxedijudibo/gi7jhgh/movie_night_at_home_basket_ideas.pdfIn PDF document text
    • https://talotemeve.weebly.com/uploads/1/3/1/6/131606578/62a92a.pdfIn PDF document text
    • https://zekupepub.weebly.com/uploads/1/3/5/9/135992873/525044.pdfIn PDF document text
    • https://cdn.sqhk.co/wusakituzu/je5BhhY/hella_90s_trivia_game_answers.pdfIn PDF document text
    • http://sdek-24.cc/josalajulukunisisu3fl.pdfIn PDF document text
    • https://cdn.sqhk.co/rifusofuwedi/9iaQjc7/4674136655.pdfIn PDF document text
    • https://cdn.sqhk.co/baresupujar/jiichib/12865146955.pdfIn PDF document text
    • https://javetepamez.weebly.com/uploads/1/3/0/8/130814931/bajumoboxixovozewo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379846/normal_5fece77d90000.pdfIn PDF document text
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/eaaf7f2a5b36e.pdfIn PDF document text
    • https://pafodezeba.weebly.com/uploads/1/3/4/5/134589846/861955.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/jhf2mge/turn_off_mail_notification_sound_windows_10.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11136 5592 bytes
SHA-256: b3aaa11b3721938f536641e337a0b778b02879c0724a5f791676955e96552fd1
font_01_sfnt_off00012427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12427 10656 bytes
SHA-256: 9144614cc4679bd1a9cc6e07226d9f13aa185413a93777a2555cde1f684cf5cf

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