Malicious PDF — malware analysis report

Static analysis result for SHA-256 adf4525348ae0f24…

MALICIOUS

PDF

67.5 KB Created: 2020-10-03 03:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: aebaad52f804f1b11ba0581b73a389ca SHA-1: ef55781aceebc8e59e0858885f559f905d7c8074 SHA-256: adf4525348ae0f24131beca6d0750b72091f0c0d3e502907ba8f189c6fd3730b
194 Risk Score

Malware Insights

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

The PDF contains embedded links and text that direct users to a malicious URL, likely for phishing or malware distribution. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL as malicious. The document body, though heavily obfuscated, contains the malicious URL and text suggesting it is an accounting-related document, which is a common lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://cctraff.ru/strik?keyword=accounting+for+general+management+pdf In PDF document text
    • http://lewad.zachserafindesigns.com/uploads/1/3/1/3/131381761/8ced874.pdfIn PDF document text
    • http://muvawuti.busiwerks.com/uploads/1/3/1/0/131070381/d07a09.pdfIn PDF document text
    • http://lefatug.mspectuning.com/uploads/1/3/1/3/131397983/seroxofetaji.pdfIn PDF document text
    • http://files.sassandcurls.com/uploads/1/3/1/8/131871864/vetitafusode-wakemez-derumamu-doxegeg.pdfIn PDF document text
    • http://files.lindseysbbqnmore.com/uploads/1/3/1/6/131636881/2007294.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/e2721138-7621-4e54-a6d3-7bd75cd46b1f/rititowefogoviwupiliviki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf40c194-58fb-44a4-bebb-fea70d9ed6db/zidevedebajitejiripipumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37fb06d8-8a96-48dc-b3cf-54ec5128a488/puvanufeluxumisavuxugum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9878c721-0e06-4a57-b531-4d3d44f58d52/tebukomisoxomoruw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f458400-280d-47bf-9164-1a141c0531ed/newimefidodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee37dd84-909d-4400-b603-4b397837e734/jusomefigodu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aaecd79-8c3d-4edf-b702-748fb562c38f/werademapot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8fd87c1-dd2b-40a5-a54a-0845bd5a0483/gowolubikowiregovo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0346/9206/files/dungeon_of_the_mad_mage_trove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2690/5245/files/how_to_disassemble_a_keurig_2.0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6379/4069/files/monk_season_3_episode_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1015/7475/files/36386811973.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_off0000cade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCADE 5284 bytes
SHA-256: 74595be6ae6131ef2b295da1edb80a0529b9de12152d18a072846d3b3e96bf08
font_01_sfnt_off0000dcc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC7 10456 bytes
SHA-256: e498d0121c99d13977d590e5d2c534300479201f9699d09670023ab248974f98

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