Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa20ad39fa124a4c…

MALICIOUS

PDF

86.5 KB Created: 2021-05-07 11:05:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6b05fbc125ab44e49314000d49476395 SHA-1: 489c88a40012ff5a5a41350865839dee86e34c0e SHA-256: fa20ad39fa124a4c3f6b26eeb0d7a5bef060922c07062888c2bed8feb98bb68f
134 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links pointing to potentially malicious or spammy content. The presence of a 'download button' lure further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/strik?utm_term=how+to+use+the+full+powers+of+your+mind PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5fd1328cc5b6e.pdfIn PDF document text
    • https://cdn.sqhk.co/dukoredod/jaifMjc/rail_maze_train_puzzler_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bosamame/gOjagiB/voice_assistants_list.pdfIn PDF document text
    • http://douchehq.xyz/rangers_apprentice_book_2_audiobook_freec9nrd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426677/normal_6004079464bbe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411493/normal_5fcebdc18ae64.pdfIn PDF document text
    • http://7lessons.space/viper_mk_4i8ogn.pdfIn PDF document text
    • http://epipog.com/823895426387cap0.pdfIn PDF document text
    • http://denuziwu.iblogger.org/fumemara.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://copyrightshelpcenter.com/rosario_dela_divina_misericordia_cantado_para_descargarj489c.pdfIn PDF document text
    • https://cdn.sqhk.co/zizaratijiga/giEihnW/snake_eyes_shirahagi_mini_boss.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421335/normal_5ffbc3625d488.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463810/normal_60170b97e0703.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/bulalowisu/probability_for_dummies_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9e8b913-4366-474d-862e-6cc1b9db1668/how_to_transfer_chick_fil_a_points.pdfIn PDF document text
    • http://lalatotusawedo.epizy.com/44100058975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ba2a278-6abe-4ef9-90a7-839188cf7463/zapituwirunuwefojekoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03f5aeef-90e4-4239-963e-60a31f6a003a/sirajikelelemeposegorun.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/18968695337.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/norijukad.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_off000112ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112EE 5228 bytes
SHA-256: c8666d4f5de6be71b9d35bc727eb2f2b85412725513375e77b8dac9688ef3725
font_01_sfnt_off000124a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A5 11784 bytes
SHA-256: 2ec91188305086d6e8f7b34769ef6efa579959b4d587d6f0f69afed21e86cd29

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