Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d5303e3ef91d05b…

MALICIOUS

PDF

98.0 KB Created: 2021-03-04 15:51:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 708b5fe2416cc3ce1272180357af601c SHA-1: 76d18758d4ce369754fe67910ac76d74b9b6694e SHA-256: 8d5303e3ef91d05b0ba43b45b30bbbc79f7a41f16e6f51b108c674ec2bd0e1bf
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to external websites, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text fragments related to search queries and application metadata, reinforcing the lure of a search result.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://golowaki.ru/award?keyword=what+is+the+cost+of+citizen+watch PDF link annotation
    • http://nizavevorupuj.mywebcommunity.org/craig_jukebox_bluetooth_speaker_system_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/sejixikerut/hedhchh/callaway_erc_golf_balls_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/walekikem/b2hk8ia/walmart_inventory_checker_playstation_5.pdfIn PDF document text
    • https://cdn.sqhk.co/bupitagalir/hfLiiDv/45639997392.pdfIn PDF document text
    • https://cdn.sqhk.co/fejovuwov/hfCieUD/wands_mod_1._12.pdfIn PDF document text
    • http://tujidal.mypressonline.com/kemuzalopug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421787/normal_5ffa42170a3e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450347/normal_60407093e4dea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383561/normal_5fd092dc40794.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/68d33e25-a765-437d-8894-ac77175d4c95/how_much_does_it_cost_to_get_a_replacement_id_in_ohio.pdfIn PDF document text
    • https://3f46bf15-0a8c-4e80-b3e5-a2e3bf90e008.filesusr.com/ugd/8e6e76_d60243ac1453449193e44c1dbb7a2668.pdf?index=trueIn PDF document text
    • https://1138278f-e8d0-45ef-aef3-dbdd7428ac52.filesusr.com/ugd/5be868_b95fd577154641948a8855cb3f8b3eb5.pdf?index=trueIn PDF document text
    • https://275320ff-96dd-455a-9699-a0fdc58b27a5.filesusr.com/ugd/943725_b77aa0d0d34f4e3e9d80e9efe7efaaa8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6704419d-2466-471b-ae11-bb719e3aacd8/mutojunib.pdfIn PDF document text
    • http://tifilow.onlinewebshop.net/nopel.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/46078810433.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/69224760999.pdfIn PDF document text
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_bfe60b57471a4ba5a1873c0750a1632c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d483e8a9-35fd-4ecb-bd6c-dd7fa86071da/93326695776.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_off0001448a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1448A 4996 bytes
SHA-256: d61863ad2712ada67f609ee2723693b6e996e9cd9399ba099f74c1166698561a
font_01_sfnt_off000155af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155AF 10980 bytes
SHA-256: 8089481a1e78f5f0931aa7d2eb1daa90bc3de83df622000ddbd826608d6acb49

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