Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab7d2f1fa4aa2c8a…

MALICIOUS

PDF

85.5 KB Created: 2021-03-15 20:07:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1197f8d92310b3a32102277d8e1cd1d0 SHA-1: 91af2344e0a232c80f37ff52df24da17351b09bb SHA-256: ab7d2f1fa4aa2c8a8553483e0a2c8bff8952d213e819f08ca867ab304c87cc28
186 Risk Score

Malware Insights

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

This PDF file functions as a link farm, directing users to numerous external URLs, including one that appears to be a phishing lure related to 'toyota highlander hybrid battery location'. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded JavaScript, though not fully analyzed here, likely contributes to the redirection or obfuscation of the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://bologen.ru/strik?utm_term=toyota+highlander+hybrid+battery+location PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446155/normal_6024237c0be5b.pdfIn PDF document text
    • https://cdn.sqhk.co/dimowitop/hdIwhhW/craftsy_pima_thread_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/hifc5g5/gopeneposuvebolodad.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/viJX6hh/88136079019.pdfIn PDF document text
    • https://cdn.sqhk.co/xoraxuvonaf/9EihWWS/japanese_translator_app_camera_free.pdfIn PDF document text
    • https://cdn.sqhk.co/buzaxelubot/ohbja1q/cut_the_rope_gold_2_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/j9Xgdjd/36275925855.pdfIn PDF document text
    • https://cdn.sqhk.co/givesaxi/QieMVtP/dobijapokimajiniwejuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451930/normal_604a2eb3a5de5.pdfIn PDF document text
    • https://cdn.sqhk.co/godezixibufo/iVIo5Sv/wwe_mayhem_toy_qr_code.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386092/normal_60044e4d32511.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/gghcOUV/super_soccer_world_football_game.pdfIn PDF document text
    • https://cdn.sqhk.co/derebeduno/Nb2ggfI/goner_piano_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/vagofedewat/bPjcheO/kebenoku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366340/normal_5fce32d0ef4e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419003/normal_5ffe0945e7d39.pdfIn PDF document text
    • https://cdn.sqhk.co/mewowoji/thcqqie/34973192823.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_5370e85e1e7743518168f3fc07fd7a65.pdf?index=trueIn PDF document text
    • https://7fc1e5b2-1dd8-4457-9de2-3dea1ab9f589.filesusr.com/ugd/fedd61_064b327888664f06b8adf831320d39c8.pdf?index=trueIn PDF document text
    • https://981168d4-05fc-44b6-871d-73371d7e8cf1.filesusr.com/ugd/87d215_778057da307b453da55bca6641ab4eb1.pdf?index=trueIn PDF document text
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_b831dd4860e74b049b96c202cba72f69.pdf?index=trueIn PDF document text
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_6976fd64d20b442195f02062a425b7f7.pdf?index=trueIn PDF document text
    • https://f06ae689-34e6-4fd9-b749-a5985747e370.filesusr.com/ugd/4117a9_31e537ee3d16411f9058661ab56fb3de.pdf?index=trueIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_6d6f1ff461694ebdbafa344e731634f4.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10413 5000 bytes
SHA-256: 5e561f56945ae911d682ed1ddb21d839c130b892bb2da1af77da8763ab28d8da
font_01_sfnt_off00011501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11501 10920 bytes
SHA-256: c6b59f79c410b3522d90bf57515ff469c003a647559dcc40c28197d156f88419
font_02_sfnt_off00013a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A72 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3