Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d1a6ad7aadc2858…

MALICIOUS

PDF

85.1 KB Created: 2021-03-15 08:42:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1e049cd850eaf9d1493b512f46c250fe SHA-1: a991f433345f5e357e382e0ec623ebffdfa931b9 SHA-256: 7d1a6ad7aadc28588eaa7930c7ee74de3a66796772fe059a7d448430dcb8180d
264 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged as a malicious redirector and link farm. The 'SE_CALLBACK_LURE' heuristic indicates the document likely prompts the user to call a phone number, consistent with phishing or scam tactics. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lead users to malicious sites or engage them in a fraudulent conversation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://dafemum.ru/strik?utm_term=interactive+voice+response+%2528ivr%2529+tpin+number In PDF document text
    • http://safagiko.iblogger.org/unreported_domestic_abuse_statistics_uk.pdfIn PDF document text
    • http://podarokinsta24.online/reached_by_ally_condie_audiobookqvlb4.pdfIn PDF document text
    • https://kageketiwef.weebly.com/uploads/1/3/4/5/134581137/a87a29cc0.pdfIn PDF document text
    • http://nasty666.space/canada_food_guide_servings_milkratjs.pdfIn PDF document text
    • https://sejirefado.weebly.com/uploads/1/3/4/6/134682993/kosedamoxetobopese.pdfIn PDF document text
    • http://tevfikyuce.xyz/lojojibisixannooc.pdfIn PDF document text
    • https://dojifidixiwaji.weebly.com/uploads/1/3/4/3/134372722/3d85b068963e.pdfIn PDF document text
    • https://bosewumakujo.weebly.com/uploads/1/3/6/0/136036310/44b51cf.pdfIn PDF document text
    • http://grampus-shop.com/how_do_i_connect_my_hp_deskjet_2622_to_a_new_wifizn2df.pdfIn PDF document text
    • http://verification-help.business/43234097850ri44t.pdfIn PDF document text
    • http://sokojutefame.iblogger.org/samsung_company_overview.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lefarobi.rf.gd/chaska_red_ferrari_ka_video_song.pdfIn PDF document text
    • https://0dea665b-aaaa-42f3-a52c-f86f0fd1efa2.filesusr.com/ugd/8b9728_09c7d3f995e9410db584e3fd15145fa8.pdf?index=trueIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_2399564f81ff4a268d436d665452eb51.pdf?index=trueIn PDF document text
    • https://c941d99d-b58b-4215-81ce-525e38db2b81.filesusr.com/ugd/2dc4cf_abf41110954a45f68330ad3b31629ab0.pdf?index=trueIn PDF document text
    • https://e7f45dcf-1957-410e-85b1-216e85a225c4.filesusr.com/ugd/a2c2bc_a050f7845ece4bb8898114295482f27f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d783305-fe98-4053-891a-959a0363e7a8/83731652195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa4eb8dd-b6f4-400f-bd71-3f9721386954/do_new_gas_stoves_have_pilot_lights.pdfIn PDF document text
    • https://4647adb0-9c01-46a1-aef1-4380d5873f13.filesusr.com/ugd/edb4a7_2d1b1305131340e3adbf580f8b2d6068.pdf?index=trueIn PDF document text
    • http://wokanulobasanek.epizy.com/sat_test_dates_charleston_sc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f3be3d2-7dd9-4a07-b877-5a4698358519/can_i_watch_news_of_the_world_on_netflix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9b3168a-1278-4eff-bcf1-97b326816186/xeledemefowefesisunida.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F8 5340 bytes
SHA-256: 31319c54b83c6557a1505e9f048887e8f870aa8075892e9a39ffb3d977b8f816
font_01_sfnt_off0001051c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051C 12724 bytes
SHA-256: 614389a33ecff187744e12abbc3d7fd3ce78b2bff0fbd5d50e3ed3832717e719
font_02_sfnt_off00012fa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA4 16292 bytes
SHA-256: a2feab87ef65584a62b4d086a834922187f60c9a5d72718656d91ee12ab69c3f