Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef26ccecc17afba1…

MALICIOUS

PDF

71.2 KB Created: 2021-04-05 20:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 602c3ca4d35fb97ec3e121212bac23cd SHA-1: dfca675f32e1d5d1b53021812521cf5d3e50ab4e SHA-256: ef26ccecc17afba1827a812f5d5fd6f06d2a1e47edd3071a264bb80487fe6c22
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a large number of external links, many hosted on disposable domains, suggests a link farm designed to redirect users to potentially harmful content, possibly for phishing or malware distribution. The document body contains garbled text, but the presence of 'sims freeplay lp hack no survey' suggests a lure for game-related cheats, a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/wix?keyword=sims+freeplay+lp+hack+no+survey PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4477379/normal_5fe50ff924ad7.pdfIn PDF document text
    • http://babitilakibo.mywebcommunity.org/core_java_programming_exercises_with_solutions.pdfIn PDF document text
    • http://mevesepegubisis.scienceontheweb.net/pakedazamifevugezuxekub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420434/normal_6028755a93056.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367303/normal_602441a8564b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384050/normal_6065b0207805c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448347/normal_6033c281bb7af.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_d93d7fe383b0409980d3671ad5748a98.pdf?index=trueIn PDF document text
    • https://d429d46a-6203-486b-8c9d-ede5597e1383.filesusr.com/ugd/419b00_151d045baf38494fa58aaa034edf481d.pdf?index=trueIn PDF document text
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_42d8efa4747f483bab65e65be7391af2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecac5966-7fbc-458c-8209-269cee41086c/que_hace_un_mal_lider.pdfIn PDF document text
    • https://0df22b04-17ae-4e65-9af8-3af4445b4601.filesusr.com/ugd/71fd01_cc9944aa619544c4a5738a58870bd646.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/17de42da-9d37-4c44-967f-9cf486d54c4b/la_ciudad_de_las_bestias_english.pdfIn PDF document text
    • http://sojusenetuki.onlinewebshop.net/aufgaben_bruchrechnen.pdfIn PDF document text
    • https://2e96d104-cacc-4af9-914c-411927af6089.filesusr.com/ugd/0f866b_9ea60dfdb62c4f5fb1c1b3fd10fe3984.pdf?index=trueIn PDF document text
    • https://b3709dad-42f4-4621-9b7e-74d31ca978cd.filesusr.com/ugd/f91cf1_95de0c7a186d4beebaff64e78407e555.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xubifupi/jugavosapekavemo.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/dale_earnhardt_jr_memorabilia_price_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/5748647018.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_off0000d662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD662 5584 bytes
SHA-256: 68ff2a825a66c90f3aec21cd6fe24d24e29c90a402b0a8671b09371e79360c7d
font_01_sfnt_off0000e940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE940 10860 bytes
SHA-256: c9ceef1837f760c7e04b00fcda741296bf0038a09ca5c31a1703fa01c3a5b7ac