Malicious PDF — malware analysis report

Static analysis result for SHA-256 e03be0948fbb41b6…

MALICIOUS

PDF

69.4 KB Created: 2021-02-24 10:49:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ca704ec3a950d895fd814e109d44660f SHA-1: 4eb30264ee5dc51dead7a733cc657322d6975fb3 SHA-256: e03be0948fbb41b6b612b897dc6c88ab0197982fc85d295920f3ab21cfa6c1c0
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for redirector links and a machine learning model. It contains a large number of embedded URLs, many of which point to potentially malicious or spam-related infrastructure, suggesting a phishing or link-farming attack. The ClamAV detection further supports its malicious classification.

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://crophysi.ru/strik?utm_term=hatha+yoga+poses+benefits In PDF document text
    • https://cdn.sqhk.co/buzivafulet/jaYfdji/25687488386.pdfIn PDF document text
    • https://tadizusojad.weebly.com/uploads/1/3/2/7/132712436/kekozuvumoneg.pdfIn PDF document text
    • https://cdn.sqhk.co/dadirowuj/vhagjMg/castles_of_burgundy_solo.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/gijjqI9/online_shopping_uk_food.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/dWrUjiq/xiwovirafobu.pdfIn PDF document text
    • https://cdn.sqhk.co/jaziwuke/h3hfiiN/blossom_blast_saga_next_update.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/7ljhBnW/6572280853.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/ihm4MiZ/hero_bikes_xtreme_200cc_price.pdfIn PDF document text
    • https://cdn.sqhk.co/xekutenupi/cnieTQc/husky_dog_puppy_wallpaper.pdfIn PDF document text
    • https://sinekagu.weebly.com/uploads/1/3/4/8/134855021/tezorulumelil-junejinap-ketav-melin.pdfIn PDF document text
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/kupipazemovemefefa.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/F92sxge/terraforming_mars_board_game_strategy.pdfIn PDF document text
    • https://demavagof.weebly.com/uploads/1/3/4/0/134017100/savuxasab-degufiz-fosop.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/bufexa/ios_full_form_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/45723491035.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/42206747411.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/chilkat_java_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/geomorphology_journal_author_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/10611322720.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_off0000d3bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3BF 5240 bytes
SHA-256: 6505e3e5302ee96887e7df31b998cfd040581e56a18c972fef6681dc2e33cd27
font_01_sfnt_off0000e5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A0 10356 bytes
SHA-256: 4e85dbdfa6a9dfa8751a0b232a5cf9a420259f3a3a57fa5bec73b5f88e7fdf94

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