Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0be8a3f4c63f19…

MALICIOUS

PDF

76.1 KB Created: 2021-03-16 13:08:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: ce4e8f9c5ea5214ce6a77e566da5c671 SHA-1: c0fe36eee2ab62c953a05eea44b4bcbaa4e5eff0 SHA-256: be0be8a3f4c63f1938defbe4ffe3d6ee1f599b7c827da520656cc78f90c401ed
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs and a callback lure heuristic points towards phishing or scamming attempts. While no scripts were directly extracted, the PDF structure and link farm nature suggest it's designed to redirect users to malicious sites, potentially for exploitation or further credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://resalured.ru/award?keyword=south+sudan+civil+war+pdf PDF link annotation
    • https://cdn.sqhk.co/wozejodes/afiYx7X/4017091580.pdfIn PDF document text
    • https://cdn.sqhk.co/xexerekija/6nidvhe/kizuxegatalamupaz.pdfIn PDF document text
    • https://kenumobubedu.weebly.com/uploads/1/3/4/3/134370592/850ceca.pdfIn PDF document text
    • https://cdn.sqhk.co/taxeseta/1hakyha/psx_emulator_for_ps_vita_download.pdfIn PDF document text
    • https://cdn.sqhk.co/diduwuposenu/igcgdhf/como_usar_uber_conductor.pdfIn PDF document text
    • https://cdn.sqhk.co/moviferu/ughiggf/lord_of_the_euphrates_age_empires.pdfIn PDF document text
    • https://tipuzinugex.weebly.com/uploads/1/3/2/6/132682040/459807c1e705.pdfIn PDF document text
    • https://cdn.sqhk.co/kujexelorite/jjsgiRL/94297775683.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423188/normal_5fdbf72027306.pdfIn PDF document text
    • https://tiwofimobodes.weebly.com/uploads/1/3/4/0/134040820/ganugu_fafovinejibali_sofifilidu.pdfIn PDF document text
    • https://cdn.sqhk.co/bemaxopig/piahiir/lumino_city_how_to_make_the_boat_rock.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381347/normal_5fe45ba4dcb1f.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/1a167d9c-c67d-470c-9cc6-05273cd9a3b2/rifobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f81f8aa-c305-430d-ae08-5d4b300a32d4/masterbuilt_sportsman_elite_30_digital_electric_smoker_reviews.pdfIn PDF document text
    • http://raziwisubuza.rf.gd/gopro_hero_6_black_user_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6ddc12f-afed-42af-b763-1ab26750872b/25111462989.pdfIn PDF document text
    • http://zukixewagiv.epizy.com/banovowikitidixed.pdfIn PDF document text
    • http://lonivone.rf.gd/39198676032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43522362-8261-4d2a-b1a9-8375fef21d54/why_does_my_ice_maker_not_dispense_ice.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_off0000eaeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEB 5496 bytes
SHA-256: be64cade567492fc2912acb6333678199aa2592f09caa1b87af4a662f765bda3
font_01_sfnt_off0000fdab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAB 10584 bytes
SHA-256: 972f06da0a0b1a138c74514a79b14a5f4256264b3fdf58e979adf753d90c73b6