Malicious PDF — malware analysis report

Static analysis result for SHA-256 692a1d23aa358293…

MALICIOUS

PDF

70.7 KB Created: 2021-04-08 04:07:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 77e17bd9ffdf69482f66d8ed35f71162 SHA-1: 48ec451bba11715dbf12937bce4821b67855d367 SHA-256: 692a1d23aa358293ab42f3a58ee024e5dac9d9d9ef01322038b881370e734930
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains numerous embedded URLs, many pointing to disposable domains and exhibiting link farm characteristics, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the presence of external URIs and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://leonvi.ru/strik?utm_term=2015+jeep+grand+cherokee+3.6+oil+life+reset PDF link annotation
    • https://cdn.sqhk.co/jasowipe/KfheTAh/bricks_vs_balls_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5feaf61788ba9.pdfIn PDF document text
    • https://cdn.sqhk.co/nananava/e9Yghf2/drag_bike_wallpapers.pdfIn PDF document text
    • http://kuzojud.66ghz.com/bay_of_bengal_weather_report_today.pdfIn PDF document text
    • https://cdn.sqhk.co/mowezeto/ugpKghg/dj_bottle_telugu.pdfIn PDF document text
    • http://wizatone.iblogger.org/96554546702.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372707/normal_5ff35308da624.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450884/normal_6035c6b5cd466.pdfIn PDF document text
    • https://cdn.sqhk.co/silonifer/zgifjgH/satopa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484364/normal_604b76971a891.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381978/normal_602d2283da4b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414695/normal_5ff42d1d6c28c.pdfIn PDF document text
    • https://cdn.sqhk.co/pujapipiwat/iinfRKC/candy_crush_friends_saga_auf_facebook_spielen.pdfIn PDF document text
    • https://cdn.sqhk.co/zibavuna/fsroqmg/39485968359.pdfIn PDF document text
    • https://cdn.sqhk.co/zijikunu/dkbhege/roblox_tower_defense_simulator_best_loadout.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382193/normal_5fd80f099c351.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4db61c00-1078-4917-8a1c-a2c1480eb6e0.filesusr.com/ugd/c94206_c169ae93ce6240b7a772a5d7849a4732.pdf?index=trueIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_7eac5f2abac84680a80e2485877c079a.pdf?index=trueIn PDF document text
    • https://56a7be67-7dca-40da-a973-69ad719fb73b.filesusr.com/ugd/fedf23_e2ca5e40535e4bd9b9a88a517100a41c.pdf?index=trueIn PDF document text
    • http://duvipegi.epizy.com/52449087680.pdfIn PDF document text
    • https://eac5c218-d238-408c-98a6-8ff0ecbb25fc.filesusr.com/ugd/b1277d_cbed11421f254e2e8757ceae3113419b.pdf?index=trueIn 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_off0000d448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD448 6264 bytes
SHA-256: a392422952b33e2a307aea1ee1ea5b37c6e7cc5e44f8666fe913393a5cd1b445
font_01_sfnt_off0000e9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A4 10452 bytes
SHA-256: 693d8580c71b519fe1eec1ed24cbbd39dd8d4ffccd0a47e8a3cbf58cc5f6a8be

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