Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6e38ebefd36c346…

MALICIOUS

PDF

69.1 KB Created: 2021-02-25 17:50:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ccc95deedbe8b916fcf74c14cef28777 SHA-1: 93cc8fbfe2b3e166930e5cb7e3e6013f03d7c0e4 SHA-256: f6e38ebefd36c34684485d927b55c5c63a41f175aa6c75d8ed07600f962578f4
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL pointing to 'seumenha.ru' and another to 'weralawubuzeg.epizy.com'. Heuristics indicate the PDF acts as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing a trojan.

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/strik?utm_term=who+services+heat+and+glo+fireplaces PDF link annotation
    • http://kedugobepuged.mywebcommunity.org/whirlpool_bottom_freezer_refrigerators_reviews.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/beats_solo_2_wireless_change_battery.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/lalawewux.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/63530823118.pdfIn PDF document text
    • http://vipimuxatomefi.medianewsonline.com/the_maker_eye_meaning_in_tamil.pdfIn PDF document text
    • http://lakujalinifibo.mypressonline.com/15708953897.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://weralawubuzeg.epizy.com/55162992460.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/jazifipuvoxefaragux.pdfIn PDF document text
    • http://xewaxal.epizy.com/acoustasonic_150_manual.pdfIn PDF document text
    • http://jizozekawa.epizy.com/graves_in_pregnancy_guidelines.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/traxxas_nimh_battery_charge_time.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/the_beatles_blackbird_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/finding_slope_practice_worksheet_answer_key.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/selenium_java_tutorial_youtube.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/hp_detect_motherboard.pdfIn PDF document text
    • http://tewidunutazi.rf.gd/lsv_asset_management_proxy_voting_guidelines.pdfIn PDF document text
    • http://liwivudelaje.epizy.com/o_que__movimento_retilineo_uniforme_acelerado.pdfIn PDF document text
    • http://kabudevegal.epizy.com/wubedixogewemawogavaxoxid.pdfIn PDF document text
    • http://didaduxazej.epizy.com/neverending_story_song_lyrics_video.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_off0000d066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD066 5488 bytes
SHA-256: b0973f47c7489b312baec1b8bbba33917c1f6c8f19aa56b962cd44682fcde5fe
font_01_sfnt_off0000e326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE326 10620 bytes
SHA-256: 94013f410fc08d58c0706a1fccadc3744521b469985152c94d1f67d801ebbd35

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