Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad12d5d17603e45…

MALICIOUS

PDF

94.6 KB Created: 2021-03-05 12:52:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 1285aaab511337c64435d26457031754 SHA-1: b12fef0b0c9c7cd012902a3dd72e71ec800060b2 SHA-256: 2ad12d5d17603e45528e4fb66131c8cc6fe71d8a403f00cfbe45f3320431e65d
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', indicating it was likely generated by a tool rather than a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/award?keyword=technologies+of+gender+definitions PDF link annotation
    • https://cdn.sqhk.co/xurajalijok/bRERJh1/34419385573.pdfIn PDF document text
    • http://verification-help.business/joxizitisepapf44xr.pdfIn PDF document text
    • https://cdn.sqhk.co/sebazisop/cEghhhd/light_up_keyboard_and_mouse_wireless.pdfIn PDF document text
    • https://cdn.sqhk.co/rawewosit/RjajeVC/voicemail_settings_iphone_xr.pdfIn PDF document text
    • http://mafeniwaparidip.22web.org/37877730367.pdfIn PDF document text
    • http://supernefritroller.xyz/komolotelri04b.pdfIn PDF document text
    • http://begetus11ppz.xyz/96559249205gwf9q.pdfIn PDF document text
    • http://1eyvgo.xyz/84957650866o2h16.pdfIn PDF document text
    • http://flowerport.market/hatikvah_piano_sheet_music_freeo5d97.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/j3jWjhH/41087738970.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/2abb13eb-be14-492c-80ab-78725227d627/vuwimuridalujekuzib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94a980ca-b486-4b90-b171-e378b49c51d1/yamaha_av_receiver_rx-v363_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/togugafukakikukojude.pdfIn PDF document text
    • http://putazosaw.epizy.com/line_6_firehawk_patch_list.pdfIn PDF document text
    • http://mapureju.epizy.com/28719100731.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f29c5079-d744-46c5-a57d-ba81a64a0d09/math_worksheets_for_grade_4_division_word_problems.pdfIn PDF document text
    • http://muxajetolalet.epizy.com/42422304610.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e783d23a-b052-478e-9474-09989b276fe8/paige_vanzant_professional_record.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2270fc03-0b54-4609-868d-201e635ef4c2/97747732759.pdfIn PDF document text
    • http://vabowako.rf.gd/panasonic_aw-_he40hk_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/009328f8-6752-4af5-b025-3b0685c73c45/which_oil_can_be_mixed_with_castor_oil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0a15f96-1aca-4c20-ade9-e7483ef727f7/how_many_episodes_is_the_naruto_war_arc.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/retumag.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_off00013838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13838 5024 bytes
SHA-256: e810cc4d2a5afda8cee32ce2295f45f0f391496d2b8153f820655d2991e9180f
font_01_sfnt_off0001494b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1494B 10348 bytes
SHA-256: 0c7f3233f6f13fd063a0442c48b00544e483d6a6a08ef9a1f95d2577e62bd97e

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