Malicious PDF — malware analysis report

Static analysis result for SHA-256 60430abbffea0617…

MALICIOUS

PDF

81.2 KB Created: 2021-03-05 01:44:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e5c2ebfb8b7a29dc03a50d017d890174 SHA-1: 6556a1cb48aa058b10017e7d1e50543b8431aac9 SHA-256: 60430abbffea0617636d8edfd7f71be3f68081b721af7772c38b5e41ae860b5c
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. The embedded URLs, such as https://baarspo.ru/award?keyword=total+gym+1500+exercise+system and http://thrivewebs.com/john_deere_riding_lawn_mower_parts_near_me8jh9u.pdf, are likely part of a link farm or distribution network.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 6

  • 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 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://baarspo.ru/award?keyword=total+gym+1500+exercise+system PDF link annotation
    • http://thrivewebs.com/john_deere_riding_lawn_mower_parts_near_me8jh9u.pdfIn PDF document text
    • https://solekavugixe.weebly.com/uploads/1/3/3/9/133999951/vawizu.pdfIn PDF document text
    • https://dalatomim.weebly.com/uploads/1/3/4/3/134344090/958ef020dc4.pdfIn PDF document text
    • https://duvutotan.weebly.com/uploads/1/3/0/7/130775700/7a63be0b58e470d.pdfIn PDF document text
    • http://makedctl.site/rakabuvorugiol046.pdfIn PDF document text
    • https://sibewelile.weebly.com/uploads/1/3/0/8/130815008/c0f047d9aac8908.pdfIn PDF document text
    • https://dojinutek.weebly.com/uploads/1/3/4/1/134108596/lotirowipu.pdfIn PDF document text
    • https://mawurimi.weebly.com/uploads/1/3/4/6/134661678/dfa314.pdfIn PDF document text
    • https://jafadunew.weebly.com/uploads/1/3/4/6/134632108/labegapilibotitemoj.pdfIn PDF document text
    • http://arenaprobet.com/7816693423agwri.pdfIn PDF document text
    • http://senteber.site/40720502583h8fma.pdfIn PDF document text
    • https://gukikaxut.weebly.com/uploads/1/3/0/7/130775725/127865.pdfIn PDF document text
    • https://vugifalufaduzo.weebly.com/uploads/1/3/4/8/134889855/146b7480107.pdfIn PDF document text
    • https://xanuzejo.weebly.com/uploads/1/3/1/6/131637194/4796212.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/bb992daf-b952-41b0-921c-f74a472b7ab6/9312817625.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d302690-1bc4-4d55-be4f-441efdd56ea3/33005236621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56854823-a901-4209-97e5-2978b462030a/how_much_do_you_make_real_estate_agent_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/guide_ryze_mid_s9.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/21301384047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1c63441-86e0-4595-939c-ef228d6a5ddd/romeo_y_julieta_capulet_cigar_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c837eab-250a-4687-a5d0-9a13627e799b/best_r_programming_book_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08d53b6e-8830-4b18-a56d-e660e9a0fa6b/3_main_design_principles_of_object-oriented_programming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cf7e93c-22d6-4862-bba0-98f399645944/is_there_going_to_be_a_warrior_cats_movie_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/332d5c1d-7485-48fb-a7ad-211e5988a50d/xokujoziwo.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/rogers_digital_tv_guide_guelph.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/lezalefesumubefidena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce3a778f-dde1-4e1f-b830-aa47556301df/unity_download_stuck_at_99.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dd8bfa4-b701-43ab-a14c-05ff02ed4397/48753743910.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_off0000fee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE3 5556 bytes
SHA-256: f2e8e07afb19db6ffe23d55a9deb3e377084a1887c283f8d73d0f84b96e72ce3
font_01_sfnt_off000111d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D0 11404 bytes
SHA-256: 7542693ae66cf850a15fe55caf568cc9b406fbf78b9a21672d839b1cd5f933bc