Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5bc2c373f7fe4bc…

MALICIOUS

PDF

73.3 KB Created: 2021-03-06 13:01:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1f86b1749679a3b80b96dae65a1773a9 SHA-1: eb2b5f54fd5844ec3cc7bcaee3f13e731e057d16 SHA-256: a5bc2c373f7fe4bc36207694c4c223e0664cce577771d291adfbc804323b2ff8
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to a 'Mass effect 3 trophy guide'. The presence of many links to potentially disposable domains indicates a link farm used for phishing or malware distribution. No scripts were extracted, but the PDF structure and numerous external links point towards a malicious intent to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://zajinet.ru/award?keyword=mass+effect+3+trophy+guide PDF link annotation
    • http://fudidudigas.iblogger.org/how_to_drive_a_car_step_by_step.pdfIn PDF document text
    • https://rizedugo.weebly.com/uploads/1/3/1/4/131453818/gupaxu_gulupajadik.pdfIn PDF document text
    • https://nelizebowi.weebly.com/uploads/1/3/4/7/134734992/mamano_kixela.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402944/normal_600d35b8a5c07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489992/normal_603df2ebdba46.pdfIn PDF document text
    • https://dimitosakusefix.weebly.com/uploads/1/3/4/6/134631941/bujojenebija.pdfIn PDF document text
    • https://cdn.sqhk.co/rawerusiwala/OSheheq/22205220550.pdfIn PDF document text
    • https://zowololo.weebly.com/uploads/1/3/5/2/135294949/5c79a0.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/jgeii2F/black_screen_bleed_test.pdfIn PDF document text
    • https://cdn.sqhk.co/zugivakizo/rHgiahb/final_fantasy_crystal_chronicles_echoes_of_time_races.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/rtkxVja/live_random_video_call_website_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370744/normal_5fd6351794119.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369165/normal_600f785d0ab21.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/xamibebulosaxug/what_are_the_names_of_some_blood_thinners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5feba23d-8a24-440e-9447-4acd33617765/nabetowolinetelekag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18c1c917-471f-400f-91e2-d01ca13f32ce/muweviwifumedonekajulokiw.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/windows_server_2012_r2_standard_download_iso_32_bit_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/fumujadonoponodudarigik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a83eb300-0ef4-47b8-a69c-81c4ab73cd54/titidalugulixakivewiv.pdfIn PDF document text
    • http://fepebojinozid.epizy.com/baroda_m_connect_plus.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/cardioembolic_stroke_anticoagulation_guidelines.pdfIn PDF document text
    • http://pulilubanis.rf.gd/play_online_car_games_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/46430666802.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_off0000e1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D2 5656 bytes
SHA-256: d16bd6524ee5ecd95b3f9c1b881eef9760eb52eb346427ff9bfff4b254835785
font_01_sfnt_off0000f523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF523 10016 bytes
SHA-256: 5f3af66e8ba84efa9dff1dcf733086b0b6c8eb278def3460897327df490330a7

Open this report in the interactive analyzer, or submit your own file for analysis.