Malicious PDF — malware analysis report

Static analysis result for SHA-256 1205245acbc4b78d…

MALICIOUS

PDF

78.6 KB Created: 2021-06-08 08:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7419126ca18fc3fbbed38cae7bdd5394 SHA-1: c7bdde604ff0c79d81120488e8aee187c38a440f SHA-256: 1205245acbc4b78d4d487fb1b0c96d8bcaa8268a6c82a33eb53f8a6a0e66ee02
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, suggesting a malicious intent to drive traffic to potentially harmful sites. The ClamAV detection and ML classifier strongly indicate malicious content, likely related to phishing or trojan distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://archism.ru/pbw?utm_term=becoming+human+part+3+worksheet+answers
    • https://verefatodefi.weebly.com/uploads/1/3/4/7/134722939/4176704.pdf
    • https://kafekejanabex.weebly.com/uploads/1/3/2/7/132740445/11bf1ddda910cc3.pdf
    • https://mejexagisogikez.weebly.com/uploads/1/3/4/4/134468566/7375189.pdf
    • https://pamibatofenowa.weebly.com/uploads/1/3/4/5/134525539/xusurozug-fogilitolama-voruroxox.pdf
    • https://fewewoxeluvatu.weebly.com/uploads/1/3/4/3/134338934/6064b6d278.pdf
    • https://namunoxup.weebly.com/uploads/1/3/5/3/135339392/wulujil-zagabideje-sozugi.pdf
    • https://xixotileko.weebly.com/uploads/1/3/4/0/134018517/7002186.pdf
    • https://rutepoger.weebly.com/uploads/1/3/4/5/134509459/sekujuxabu.pdf
    • https://webexozaputer.weebly.com/uploads/1/3/2/6/132681415/salesafixoxoguwe.pdf
    • https://miganavon.weebly.com/uploads/1/3/4/3/134368237/kaxasote.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/e320adda-432d-44ea-92de-29a216eee0ef/bufowekegasorixe.pdf
    • https://uploads.strikinglycdn.com/files/ba4d1cb5-ed02-4b0f-901c-a69ed2e876f9/anjaana_anjaani_full_movie_hd_1080p_download.pdf
    • http://juwelite.pbworks.com/w/file/fetch/144543753/51161386976.pdf
    • http://najapenoz.pbworks.com/f/67425533693.pdf
    • http://legesir.pbworks.com/f/pdf_xchange_editor_pro_5.5_serial_keyfree_download.pdf
    • https://uploads.strikinglycdn.com/files/fabe765e-db89-442c-b074-9596fad8c287/devoir_interactions_fondamentales_1ere_s.pdf
    • https://uploads.strikinglycdn.com/files/d8c71f1f-bb36-4c41-9849-b70ed795c992/quantum_field_theory_in_a_nutshell.pdf
    • https://uploads.strikinglycdn.com/files/7b7109eb-a127-4097-98f2-1a0bc4106c55/7874603744.pdf
    • http://pinurakus.pbworks.com/f/what_fruits_are_grown_in_puerto_rico.pdf
    • https://uploads.strikinglycdn.com/files/b6e95ea9-4ef8-42ae-a647-d3a5bf5f4c26/tevubarufup.pdf
    • http://punumiboxo.pbworks.com/f/neverwinter_river_district_adventurers.pdf
    • https://uploads.strikinglycdn.com/files/e1b1ba93-ccc3-427d-b34c-db09763d952e/70466116586.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e53b.bin
33ca184924ac6729276e0f85098cbce07e5a27362639471df6e2d674139bb8f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE53B 5568 bytes
font_01_sfnt_off0000f807.bin
4f853bb7971db8bab774ccf9702ad9885b0403393120bc081ea1fcf6e4891cd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF807 11012 bytes
font_02_sfnt_off00011d3d.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D3D 4324 bytes

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