Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae62800015271f4c…

MALICIOUS

PDF

76.1 KB Created: 2021-03-19 03:30:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 03d150ca9fdcd0913a49af7231994ee7 SHA-1: 1dd2ff2440e8e7907c65be9606459d8bae855395 SHA-256: ae62800015271f4ccdb54de74095f50454f6f3670d758b57789ade9bf491c637
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/wix?keyword=happy+wheels+tyrone PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489583/normal_603014553e5cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459939/normal_604af6645ace5.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/bxjbgfz/ceramic_art_tile_shop_camberley.pdfIn PDF document text
    • https://cdn.sqhk.co/kobamebexog/dgfisgN/zewivogip.pdfIn PDF document text
    • https://cdn.sqhk.co/gulifunanale/G7xwji7/skyrim_face_editor_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/vilosezuj/hj2879p/doot_meme_meaning.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492600/normal_601d9eda07ff4.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzededoz/Bpvhhja/55906862013.pdfIn PDF document text
    • http://riniwovefaraw.22web.org/joxojuzamefoverotitobu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vafavumefetad.rf.gd/libros_sobre_aprendizaje_basado_en_proyectos.pdfIn PDF document text
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_d928cbb728394f10a03c51d56d725b1b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/77e19c98-4257-4e5c-bd4c-f18f76ad0ca7/samsung_grand_prime_plus_hard_reset_code.pdfIn PDF document text
    • https://b5d51143-f34a-4a4f-9265-6917490cb775.filesusr.com/ugd/9f69bd_7c055f915342476682c4308478ecf698.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d9da967-3f2e-49c8-85f2-8e2f31eaa5f0/2016_subaru_impreza_sport_limited_vs_premium.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5b6151a-13c8-49a6-801a-36a492178e1d/who_sells_relion_blood_pressure_monitors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/213ba394-e71e-4f20-9068-9d064461ac7d/how_to_update_samsung_galaxy_tab_3_7.0_to_lollipop.pdfIn PDF document text
    • http://fugewad.rf.gd/ucsd_data_science_double_major.pdfIn PDF document text
    • https://a49aa754-465e-4bbd-924e-b3d0e7b66bd4.filesusr.com/ugd/81d6a4_d8c9993d63304e0ab44eb106792f60aa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/326cf3cf-1175-415d-ac00-6bb1b1aa6955/how_do_i_reset_my_dikang_infrared_thermometer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e8b1763-67df-4fbd-9198-75a438a11a51/how_to_create_a_drop_down_list_in_excel_2013_with_colors.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_off0000ec23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC23 5064 bytes
SHA-256: 7ad4ab9b033990a630101aa18cdfa7481888a2ace8bfa4263d62c2fe005f4a2d
font_01_sfnt_off0000fd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6A 11076 bytes
SHA-256: eab9073e11d612ac04fb9dbd671e3ea59fe4ce5f942a5217b9aa66e806634667