Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d3a337886507d50…

MALICIOUS

PDF

78.4 KB Created: 2021-03-22 19:55:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03255c84c0213514b8e8f4044b59924f SHA-1: dfb6605f013a427b1e167158af0634a8d86021f5 SHA-256: 5d3a337886507d5014a488979e99eb14b9460ed7e30b7db891d4d45f2f6abd44
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The embedded URLs and the document body's reference to 'action verbs images pdf' are likely pretexts to encourage clicks on these malicious links.

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 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.
  • 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/award?keyword=action+verbs+images+pdf PDF link annotation
    • https://sibotapitagota.weebly.com/uploads/1/3/4/3/134378411/9752381.pdfIn PDF document text
    • http://afracheat5.xyz/30061295277cjl2f.pdfIn PDF document text
    • http://paypallsecurity.com/48532543927mpp14.pdfIn PDF document text
    • https://cdn.sqhk.co/leredupodeka/jihdNBC/bollywood_songs_2018_video_hdvd9.pdfIn PDF document text
    • http://sweetygirl.club/is_projectile_protection_good_for_the_witherbqhuq.pdfIn PDF document text
    • https://toxutumopomepe.weebly.com/uploads/1/3/5/3/135327812/sepaxokevem-vinovovulej-mavaxoluxu.pdfIn PDF document text
    • http://liolika-rsya.ru/46286002291tu4sf.pdfIn PDF document text
    • http://joblanc.xyz/92136308643fvy68.pdfIn PDF document text
    • https://webakutukulufu.weebly.com/uploads/1/3/2/6/132683024/gakapituroxala.pdfIn PDF document text
    • https://cdn.sqhk.co/fezivabuja/OIbhija/dezojonagot.pdfIn PDF document text
    • https://cdn.sqhk.co/wugeguxu/Qz5geJr/cowboy_bebop_wallpaper_1920x1080.pdfIn PDF document text
    • https://pitisugokusibim.weebly.com/uploads/1/3/4/4/134445344/fowinofusesidu.pdfIn PDF document text
    • https://disadoxamegipu.weebly.com/uploads/1/3/4/5/134527150/6271152.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/156c1057-29eb-4fa1-9e5b-0b07b8cbf50a/time_capsule_definition_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c75ec8-6c7b-42b3-aabf-840d3bf86a06/louisiana_business_math_curriculum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e52a664-aeb5-4b89-a7f1-f41de8a1c5e6/11354776603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e29a6c8-76e9-4663-90e5-3dd743b6d784/how_did_the_3_estates_contribute_to_the_french_revolution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aadee219-7edf-4392-bbdd-8211ea8077a8/82137785239.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12664bc4-c3b9-4590-8272-3a3d5db23097/34961270011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78dcb7ac-77bf-4043-86ae-09faecd2b393/21828601594.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dae0e2a-b738-4f6a-bf24-c4a6ae8ddace/world_war_z_crossplay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fc3b9c6-47af-4af6-a60a-bdf0470dbdc9/how_to_sew_a_face_mask_with_pleats.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_off0000f524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF524 5632 bytes
SHA-256: 5f026489311c6ff4a0af9a553a34af81002bcbae007aaa31e5e8c1f82309aec0
font_01_sfnt_off0001083d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083D 10496 bytes
SHA-256: 9f2bfa1016237646586c39dd1b3367b20375c329cca64c73ed7b322628d9422a