Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62093d268c9cd39…

MALICIOUS

PDF

79.8 KB Created: 2021-02-09 19:30:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d68a08a644ffc881b12a29674594cb9d SHA-1: dd9fbca0c14ceff8ac014c1c9a4d9ac0efa3722c SHA-256: d62093d268c9cd397ebc2dccd4e779eb658dc64ff34129cdbc618ce90d0f5fa1
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 external URIs, with a primary one pointing to 'seumenha.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains keywords related to online forms and financial results, reinforcing the phishing lure.

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
  • 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://seumenha.ru/aws?utm_term=bsf+online+form+sarkari+result PDF link annotation
    • https://cdn.sqhk.co/kekumumaxow/ccDfgjK/xexesipobolubiluvodo.pdfIn PDF document text
    • https://dudunetexuzo.weebly.com/uploads/1/3/1/3/131379759/ac7c8513ec5b575.pdfIn PDF document text
    • http://gutemelav.22web.org/cool_last_names_yahoo_answers.pdfIn PDF document text
    • http://sepibuzare.22web.org/66669659726.pdfIn PDF document text
    • https://cdn.sqhk.co/firijanab/Kjeiihj/xedol.pdfIn PDF document text
    • http://zikuwojanubeg.iblogger.org/gana_prabha_audio_song_tamil.pdfIn PDF document text
    • http://motivawka.online/kanafo0qrbn.pdfIn PDF document text
    • http://terubib.22web.org/ap_ssc_marks_memo_duplicate.pdfIn PDF document text
    • https://warevinigipa.weebly.com/uploads/1/3/4/8/134898994/5bfa3c.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/BlhdgCC/true_story_behind_gangs_of_new_york.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/iija4yU/volume_booster_pro_sound_booster_for_android.pdfIn PDF document text
    • https://fomodaduvi.weebly.com/uploads/1/3/4/7/134700625/jazapajobumejek.pdfIn PDF document text
    • https://fanolukexepafo.weebly.com/uploads/1/3/0/9/130969893/fadiliveg.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://s3.amazonaws.com/napejaxosinages/aditya_birla_sun_life_mf_fatca_form.pdfIn PDF document text
    • http://fonenutekosut.epizy.com/rikuzugokinevu.pdfIn PDF document text
    • http://pefanusomi.epizy.com/official_bitcoin_android_wallet.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/makalah_hernia_diafragmatika.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_off0000ee18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE18 4908 bytes
SHA-256: 91580b993ca8d79b09c877c3a99611ff2a553fec25ccc8132894da0ed6a678ed
font_01_sfnt_off0000fea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA8 10864 bytes
SHA-256: cc18924bfc0d532ff1bcf568ee700901befc9ec07067f0b208e9ea87e7494f12
font_02_sfnt_off000123ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123AC 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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