Malicious PDF — malware analysis report

Static analysis result for SHA-256 625769511019ee9d…

MALICIOUS

PDF

64.8 KB Created: 2021-01-03 07:55:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: dc703e4932e594b7c4842b7c2fdd629f SHA-1: ed1b8708e6817507daa920e42daf7d315195c6f4 SHA-256: 625769511019ee9d7b761186e45652872b5260e1ea7b10c3db0271e64ae57a8d
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure or potentially malicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO spam campaigns. No scripts were extracted, but the document structure and embedded URLs suggest an attempt to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/aws?utm_term=ocean+12+music+free In PDF document text
    • https://cdn.sqhk.co/wuvexudid/9jjB6gd/mukireririfusaxugewe.pdfIn PDF document text
    • https://kekidebas.weebly.com/uploads/1/3/4/6/134633427/xufodufamawarupi.pdfIn PDF document text
    • https://tasukivokojut.weebly.com/uploads/1/3/4/5/134592673/roxirebudes_kiduzomepef.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/qjhdBgg/sniper_shooting_mission_target_3d_games.pdfIn PDF document text
    • https://tivavazo.weebly.com/uploads/1/3/5/3/135337759/muxinafetekiwesesi.pdfIn PDF document text
    • https://bewotenugajuvu.weebly.com/uploads/1/3/2/6/132695730/liditanokew-mopisugodobati-miramanumadafe.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/juvuraguvutoxif/live_abstract_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/noise_complaint_letter_template_to_landlord.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/182a8fa6-baf7-489b-9270-160ae92341e9/osrs_chompy_bird_hunting_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/532b9918-74be-4d4b-9b57-895bfef41857/wonepagavufozevuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8673c689-6efb-4c74-916b-9abae89dd432/pot_video_player_for_windows_10_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e12d016d-323f-4c6b-9b15-e6f5b308c838/ludokewawotogim.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/candy_crush_soda_game_for_laptop.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/4633556066.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_off0000c14e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC14E 5208 bytes
SHA-256: 19f00184a1de4cd9527b757f12d038c0f2cbbd664b73f429351f7b943b5b9ec6
font_01_sfnt_off0000d2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F4 10448 bytes
SHA-256: d8420c8e9a660a7dbf04b6ea327a76e25990fca563d1ce7cdb1fe5a6f90b6d7b

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