Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e51b008e9ed4c40…

MALICIOUS

PDF

75.7 KB Created: 2021-03-21 10:33:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: fa08b519f5ad379b0121a1efc7f0b4b2 SHA-1: cadde4a6f8ccd56f482c2eb893627580450d0e80 SHA-256: 0e51b008e9ed4c406febeb0849be5a676d4533b1c3e77c2f8aa481ebcc5a8bde
124 Risk Score

Malware Insights

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

The PDF contains embedded links pointing to known malicious redirector infrastructure, specifically 'https://yafferge.ru/strik'. The document body, though heavily obfuscated, contains text related to 'Dark souls 4', suggesting a lure to entice users to click the malicious link. The presence of multiple disposable hosting domains and UTM parameters further indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=dark+souls+4+kings+bonfire In PDF document text
    • https://cdn.sqhk.co/tajiwikiter/gdQjgMR/multiple_business_accounts_on_instagram_use_music.pdfIn PDF document text
    • https://cdn.sqhk.co/bubarozotuj/SxFgfhd/78523042931.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/OhfFige/mijobigurilavemuresor.pdfIn PDF document text
    • https://cdn.sqhk.co/kizofapekeku/AjgKH2R/mediatoolkit_windows_10.pdfIn PDF document text
    • http://tuvivukaroj.mygamesonline.org/coleman_powermate_maxa_5000_er_specs.pdfIn PDF document text
    • https://cdn.sqhk.co/judawube/haibgcV/mukiroti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bodufusuviv.epizy.com/bevenurelitafipuziretamuk.pdfIn PDF document text
    • http://bugenerefajujus.atwebpages.com/17536010791.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f373a8f8-a754-4d1b-97d6-5e3732b80675/woodworking_plans_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceb87e20-c943-4288-a9ec-b964daa24a01/ribunifufuviwigisirimabog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/470e7b91-25e1-4b59-a7e4-4a6051aeb1f1/how_to_make_overnight_oats_to_lose_weight.pdfIn PDF document text
    • http://fojofediwesifog.rf.gd/supply_chain_management_jobs_houston_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6acfe18-fd2f-44b3-83d0-ad0a6b96be5c/kubix.pdfIn PDF document text
    • http://tanatanozososud.rf.gd/kozewatigotune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e367525-36e7-4bb9-ba71-0d4b6b2def46/75216767683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff40cfa5-592e-46b7-9b6c-e466265fb18b/how_do_you_make_a_wordle_on_microsoft_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aa277e3-f000-4639-a9ac-6948377a379b/80737038079.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e95ef541-7924-478f-bf43-e1bcfdac9e34/zubapaluxulurugoxaxudogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c954130f-6f77-4feb-9ed0-46bcaa08c28d/lanudubuwovewiwesaxunib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8848dad6-60f5-4eb4-a7d9-115793be7d62/working_with_the_law.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e49e157-4f53-4a80-aa08-84d7b1785993/foloniwawulafenumogetex.pdfIn PDF document text
    • http://lozijuxul.rf.gd/23739894595.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_off0000eb80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB80 5224 bytes
SHA-256: 9a9f7633f7cbbe203ae15a34e66aaab272b045068dff9f9d1b52c938920dc462
font_01_sfnt_off0000fd68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD68 10508 bytes
SHA-256: 7756f9f6287c5b1f4852c313e8d0690588b42e2f81e9a6faae5b7bce2522b266

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