Malicious PDF — malware analysis report

Static analysis result for SHA-256 49fa1cba163313c8…

MALICIOUS

PDF

79.2 KB Created: 2021-05-04 02:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9f3f334fe9082cc8af3c0271f91d33c1 SHA-1: 1b88a87d3df1c7c96f8d51aeb8c3805b5ed21f68 SHA-256: 49fa1cba163313c852867c271b895b1096e7d73b5c3d273a8f27e20be4673065
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords related to game controls, likely serving as a lure to direct users to malicious URLs such as https://mezovuduw.ru/strik?utm_term=how+to+change+jump+force+keyboard.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/strik?utm_term=how+to+change+jump+force+keyboard PDF link annotation
    • http://veraxibowamopax.iblogger.org/characterization_worksheet.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/yamaha_dgx_640_price_in_nigeria.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bemuvarewu.onlinewebshop.net/45492662167.pdfIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_e41667e837994ce9ac67c4794043be5b.pdf?index=trueIn PDF document text
    • https://a1bd7baf-2de3-4c81-8914-4b74a732ecf9.filesusr.com/ugd/c89f15_1392ed930c7048118e0847a1720baf9f.pdf?index=trueIn PDF document text
    • http://ruzakema.onlinewebshop.net/12941522526.pdfIn PDF document text
    • http://wufutogaj.epizy.com/ralapifusosemexej.pdfIn PDF document text
    • https://e29a9437-b0a5-48a6-9afa-908397ce514a.filesusr.com/ugd/16a9c1_6047d79aae614711a79a9c6be5fd8f1b.pdf?index=trueIn PDF document text
    • http://radujexoxetapil.epizy.com/vurimumenoxuvilukixaxugow.pdfIn PDF document text
    • https://91953a53-6f32-4f2a-9b2e-0f954541ff31.filesusr.com/ugd/dad90e_80955f4db0c644a4b4191f6d9d0e5253.pdf?index=trueIn PDF document text
    • http://kukokiw.rf.gd/milady_cosmetology_book_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/gowiderag.pdfIn PDF document text
    • http://nawugem.epizy.com/yaara_manjul_song_status.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/sowitawupi.pdfIn PDF document text
    • https://cd70d4e5-4a1a-4071-96d1-f2415ea5ece1.filesusr.com/ugd/7f46b5_8eda10ad3a414227af12f160ac903de2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dalava/semufigareratudavo.pdfIn PDF document text
    • http://xuvafinuvewabek.epizy.com/51090572350.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/full_size_bed_sheet_dimensions_in_inches.pdfIn PDF document text
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_a2730f213142469da6f0de33fd4e10b9.pdf?index=trueIn PDF document text
    • https://df867d32-629d-4b48-af14-2fc5df20f827.filesusr.com/ugd/287761_be0502728e9848e8805bf68a64e6ef78.pdf?index=trueIn PDF document text
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_81baea2c047442e8858101217b0c4d4a.pdf?index=trueIn PDF document text
    • http://sikofus.epizy.com/sinunowofewusin.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_off0000f3c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C1 5796 bytes
SHA-256: d129bf9fda26e8f7ef4c2b845f3f8664debea97b63076e84c36bc0d3c9c90712
font_01_sfnt_off0001076f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076F 11780 bytes
SHA-256: 3da0993c5881b1dfd86c4d4241bbe49a119573666d0b486b3fe3edd6b5b466f4