Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6d8797122cf6b6a…

MALICIOUS

PDF

77.0 KB Created: 2021-05-03 14:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 301aa77529d3f1e3d93e1e945b448ec2 SHA-1: 72d7e3549213582708ffe0c8324399a5965a15fe SHA-256: b6d8797122cf6b6a024874618b28c9b6fc56dec102ad377c4c281e35a95a135a
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a link farm and a critical ClamAV detection. The embedded URLs and the PDF structure suggest an attempt to redirect users to potentially harmful websites, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous external links indicates a malicious intent to lead users off-site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dugedepap.ru/strik?utm_term=i+am+who+i+am+bible+scripture PDF link annotation
    • https://cdn.sqhk.co/tiluzegata/gcf4hjG/48201339159.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/gdSpTie/mezogapuwewagis.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/qBPhc1Y/free_wallpaper_for_cyberpunk_2077_4k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408873/normal_60270f5f57c81.pdfIn PDF document text
    • http://tareworig.mywebcommunity.org/davujefobumesaxepapu.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/what_are_the_benefits_of_using_a_hyperbaric_chamber.pdfIn PDF document text
    • http://fetedeju.mygamesonline.org/modern_high_end_valve_amplifiers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451762/normal_602f9043132af.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/gfAhehd/pacifying_tone_definition.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461483/normal_5fc977d4f224c.pdfIn PDF document text
    • https://cdn.sqhk.co/sikudile/TEieidp/vocabulary_a-_z_student_login.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403687/normal_60014e4320d72.pdfIn PDF document text
    • http://terugate.mypressonline.com/97884535513.pdfIn PDF document text
    • http://mofemaruwek.sportsontheweb.net/61013356897.pdfIn PDF document text
    • http://megiloreb.mypressonline.com/83884247293.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479214/normal_5ffb2c2b9feaa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bd35a48-c2c3-4961-8dc6-726d101fb64a/satonulotibalotupisezif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27d45929-7192-4d85-9466-a0b1d1ea4e3f/49923961363.pdfIn PDF document text
    • https://b1d4f555-1eac-4d61-aa83-27206cf3ee4b.filesusr.com/ugd/1706f5_47ae85ddb87240e8a7106d410cc39be9.pdf?index=trueIn PDF document text
    • https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_e651857ca56a45a1acb7a1f039e3b070.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/43ee125a-96d4-496e-9210-410adb246db1/guided_imagery_scripts_for_performance_anxiety.pdfIn PDF document text
    • http://lukafimagog.atwebpages.com/materi_pendidikan_agama_islam.pdfIn PDF document text
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_2a1d8d76ea7140ce95990ba871963d7c.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_off0000ef62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF62 5344 bytes
SHA-256: d602f498f165220554f3b17d0eaee1f6348b4441578b68f009baa634fe438ad9
font_01_sfnt_off0001016d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016D 11020 bytes
SHA-256: e2952380e144a1e249d784df1660c32b89de5d746f4a861a9fe0fb92147da50e