Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bafabb505f6cd0f…

MALICIOUS

PDF

88.1 KB Created: 2021-04-18 07:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5bd5b319d1274b80e8e7565c19efcd72 SHA-1: 5981b482859229c4c473218d14d21ce499c0923e SHA-256: 8bafabb505f6cd0f047573133c536c14d2abef46105e4e927a4d25b3d6ff2e38
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one heuristic specifically identifying a 'PDF link farm'. The primary malicious URL, 'https://jacksth.ru/strik?utm_term=casio+triple+sensor+sgw-1000-2ber', appears to be part of a phishing or scam campaign. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

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
  • 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.
  • 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://jacksth.ru/strik?utm_term=casio+triple+sensor+sgw-1000-2ber PDF link annotation
    • https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/xofire.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368998/normal_60062c9b4c591.pdfIn PDF document text
    • https://niravewowinud.weebly.com/uploads/1/3/5/3/135343761/32263.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484623/normal_5ff867cfdf764.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479678/normal_5fcbd8ff8588e.pdfIn PDF document text
    • http://samafutanub.mypressonline.com/81317027729.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/29722948-a306-4d6a-be8a-f39fe740b523/acer_chromebook_laptop_walmart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e034bef9-63d3-4646-b441-452251b4ada0/42407567882.pdfIn PDF document text
    • https://d70b1dc8-7d09-4148-9854-e6a7cae1b87b.filesusr.com/ugd/5899d5_83f1f840175c46da8b5211bc73c523e5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/146c9bc9-d2bd-4876-aa30-e20d19cc2708/jamarefozun.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/32868543964.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/70192918399.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/15636096331.pdfIn PDF document text
    • https://6ba8113a-99dc-4618-97bf-d7180f10ff72.filesusr.com/ugd/b6edda_b974654e4ab24aca8f73e42043651f8b.pdf?index=trueIn PDF document text
    • http://kufekisawisewo.onlinewebshop.net/first_law_of_thermodynamics_examples.pdfIn PDF document text
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_ced9848966d842fb9514981da1744a7e.pdf?index=trueIn PDF document text
    • http://dawejur.atwebpages.com/alodine_1500.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/computer_system_validation_protocol_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92b7f253-dd06-49d8-91b3-d9b57b0b0ba1/bubuzuruxojetupete.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/commerce_department_steel_report.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E8 5388 bytes
SHA-256: 322493b19ce1c1c94f035b276ee475ccef97a36af1d94f2cf271cc2c0f2042c0
font_01_sfnt_off00011b62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B62 12284 bytes
SHA-256: a9265d8258f72f0050ef8534bc3972571d973a4595b6319544a39efb5212bebb
font_02_sfnt_off0001453e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1453E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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