Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6ebdfd7901ceac0…

MALICIOUS

PDF

131.3 KB Created: 2021-05-14 08:41:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4f99827d019d2e354b00632495831306 SHA-1: dac06c5cede701a7ea8c3d5b597d6ba7cd249770 SHA-256: f6ebdfd7901ceac0769800bd924a8fd6d181cdfd0dc0ce9d7eb47a1752cde0c2
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jottigo.ru/strik?utm_term=caedmon%2527s+hymn+bede PDF link annotation
    • https://cdn.sqhk.co/mofijovelu/aggfmXY/first_aid_training_red_cross.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/LRifgeb/towudopamobotupoguterabu.pdfIn PDF document text
    • https://cdn.sqhk.co/mutuwatu/FFDvhbb/best_photo_editing_software_for_beginners_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/bofimekowadu/ijXVjix/9600636052.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://29ca30ec-7ad4-487f-8637-d2d67f3a323c.filesusr.com/ugd/10b11f_95071f411c5b4390a568e6c2085f4572.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zopenave/destiny_2_endgame_guide_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55e752e3-c016-49e6-8a65-47cccdd221ad/domaliziwisuj.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/64958193866.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/51025691086.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/skills_gap_analysis_report.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/71849841600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5876ff24-040d-4370-89bd-d44e0aec61ee/remington_model_700_sps_camo_bolt_action_rifle_30_06.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/epidemic_diseases_act_1897.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/what_can_you_put_in_a_spinach_smoothie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03df11cd-88b0-4a6e-b4d2-6b3bd0f7a500/have_yourself_a_merry_little_christmas_karaoke_download.pdfIn PDF document text
    • https://c83cbd6e-a134-4b49-ba12-49f24c654ad9.filesusr.com/ugd/904a8b_9573b3b8858747eca4a56770651236a9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/adba31e7-78a9-4a48-b319-249f0ef10324/kakivufolagapiwezedeg.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/codes_for_ge_universal_remote_cl3.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/dbz_android_21_good.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/pijuvaz.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/madubavagadetuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/2688729644.pdfIn PDF document text
    • https://98cdd5c5-c43e-49eb-9373-39517e896cbb.filesusr.com/ugd/90661f_43d58400d5804449b220951055a062c3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d8f5cb7-b03a-4e72-9c77-409a90ad6bcb/januxosibeworokigezipoba.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c59e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C59E 5116 bytes
SHA-256: 77a33ab081ae03b205185e587ce21faf46995f6e8fb1cf080017d4b69122101a
font_01_sfnt_off0001d6e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D6E5 11588 bytes
SHA-256: 90ce4311ff6dab49517251523cb3cae8241851ec6502f2ee8d68492535e60184

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