Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7ce2a80b08e4713…

MALICIOUS

PDF

84.8 KB Created: 2021-05-19 07:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a2ffbb89c053e32521bbd798f2b2eb3 SHA-1: d8b9f6d6a06c53463870aa819c5f354a486e2d7c SHA-256: e7ce2a80b08e47138f24e8eae0a6ed857a0c231ca8a83680490f21b32aefafe9
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a prominent one leading to a domain associated with phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains strings that appear to be part of a lure related to 'Csr racing 2 cheat ios'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=csr+racing+2+cheat+ios
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/93b2c1b93f2bca.pdf
    • https://dapasubasawesol.weebly.com/uploads/1/3/4/3/134383907/jagefari.pdf
    • https://dilaxizinis.weebly.com/uploads/1/3/5/9/135973905/f3518a.pdf
    • https://cdn-cms.f-static.net/uploads/4485810/normal_602e76f97a7fe.pdf
    • https://cdn-cms.f-static.net/uploads/4475738/normal_605a6a4606fbf.pdf
    • https://cdn-cms.f-static.net/uploads/4426262/normal_605a4a6dcb0d4.pdf
    • https://kaxebovirufuj.weebly.com/uploads/1/3/4/3/134399635/3cc7140c.pdf
    • https://nabezaxe.weebly.com/uploads/1/3/4/8/134852032/ad723.pdf
    • https://cdn-cms.f-static.net/uploads/4369502/normal_606c385ce7277.pdf
    • https://setozovijigaze.weebly.com/uploads/1/3/4/3/134383391/4359140.pdf
    • https://cdn-cms.f-static.net/uploads/4460677/normal_5fe991dbf33a9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mexavofezoxi/vasowelokenigom.pdf
    • https://uploads.strikinglycdn.com/files/a44e6d5a-fe74-4666-90e0-edab66fc508b/their_eyes_were_watching_god_chapter_19_quotes.pdf
    • https://uploads.strikinglycdn.com/files/3d1214ec-e0d9-43af-877a-3e90664499d9/62955308686.pdf
    • http://turikumulalevi.rf.gd/sukozefofamima.pdf
    • https://s3.amazonaws.com/tigovatolis/vifesomum.pdf
    • https://uploads.strikinglycdn.com/files/7fbb2a8f-2bba-4e4c-a7e5-05487787d886/stihl_gas_powered_weed_eater_for_sale.pdf
    • http://sonapap.rf.gd/bixifonom.pdf
    • http://tilanetojik.rf.gd/sales_skills_assessment_test.pdf
    • https://uploads.strikinglycdn.com/files/192d4773-1ae7-4d75-80fd-a245f8d578ac/35904055865.pdf
    • https://uploads.strikinglycdn.com/files/df8fa36a-75e4-4176-a1e7-5c4fb3d30249/9838728624.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f630.bin
efbf077d38e18f3a0b7f3c313752b32391a801bc7dd610d9d5217bbef7af7fec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF630 5068 bytes
font_01_sfnt_off00010767.bin
5cf1fd5beceb5797760c8be87f4f7ac7c01abdd034eebbd4740e4c7083c70336		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10767 12412 bytes
font_02_sfnt_off00012e88.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E88 16204 bytes

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