Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e203ad701f85f78…

MALICIOUS

PDF

72.7 KB Created: 2021-03-29 02:39:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ab6efc52514ad428b88872209fff3e2e SHA-1: d3d6299e5a7bf4230d57e02e89c4b191219e4c72 SHA-256: 1e203ad701f85f78ca9ceba512d29456b33ef5eec181562721ec30f3720826bc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, suggests a lure related to 'Advanced ip scanner para android', indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/123?utm_term=advanced+ip+scanner+para+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385413/normal_604ed835446c8.pdfIn PDF document text
    • https://tugalebuwe.weebly.com/uploads/1/3/4/0/134012885/741d2523164f.pdfIn PDF document text
    • https://zekigoduse.weebly.com/uploads/1/3/4/3/134336209/wuxegaxorava.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405953/normal_604c9c96cd116.pdfIn PDF document text
    • http://samoe-samaya.ru/macbeth_guilt_quotes_act_3_scene_4tzf08.pdfIn PDF document text
    • https://waxukazo.weebly.com/uploads/1/3/1/0/131071095/3047129.pdfIn PDF document text
    • http://olymptrade.buzz/54074022799tpd3v.pdfIn PDF document text
    • http://extrameets.fun/ps_vita_emulator_for_pc_32_bit_download0d7ww.pdfIn PDF document text
    • http://zoosalon.org/89160224474g13w4.pdfIn PDF document text
    • http://tegor.xyz/lee_patrick_strobel_booksxonwy.pdfIn PDF document text
    • https://jafoxexaromomev.weebly.com/uploads/1/3/5/2/135296472/8f2c81cfa7de.pdfIn PDF document text
    • https://muxililepojas.weebly.com/uploads/1/3/5/3/135344509/bekogufopejizi_sepimafomapu_jevatiweno.pdfIn PDF document text
    • http://chtotakoeverti.biz/wugujafis49fw.pdfIn PDF document text
    • https://vuvogotekepuma.weebly.com/uploads/1/3/0/7/130776629/3ab9ade6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3f31488-0f3d-4347-9850-9995e3d74cfd/macbeth_act_2_scene_1_2_3_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6352cfc3-c070-435d-8682-7ff85f6dd68c/45263344594.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_off0000e02e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02E 5084 bytes
SHA-256: 0e7075d4b2386a5d1a3a079131cbc6b8b3f1f14f7adaf30eacb3e29b14f5fcab
font_01_sfnt_off0000f18b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18B 10772 bytes
SHA-256: dd63988d6dec5c3fd4b2d6699e7e175a06b6e7b41889f106917beeffe13dc192

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