Malicious PDF — malware analysis report

Static analysis result for SHA-256 d291ff06bc763ad0…

MALICIOUS

PDF

85.3 KB Created: 2021-05-01 14:41:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2632141c54d7098ecc65245b37e372c5 SHA-1: 8512361d36331ea12b56219f737bdc5ee811ac13 SHA-256: d291ff06bc763ad014f2dc12af7823c0e6a4f530adf8fe4eaad4ff896adb60d4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=carry+on+suitcase+sale PDF link annotation
    • http://shoes-storie.club/lunogoviweteni2qz7q.pdfIn PDF document text
    • http://mnogolidov.xyz/64543587627moe8v.pdfIn PDF document text
    • http://dronextactical.xyz/248819360204eq6f.pdfIn PDF document text
    • http://nazorizuz.medianewsonline.com/34282680762.pdfIn PDF document text
    • http://jajolamuseku.medianewsonline.com/3335224796.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://uploads.strikinglycdn.com/files/61b4dafb-feaa-4de3-8879-2c536cf31eca/64007346659.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/2002_f150_running_lean_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1323cc2a-6585-4c6a-863f-5565de59d66d/9981642584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66ca46eb-e65b-4d9d-b6f6-b05dd033bbca/12616935566.pdfIn PDF document text
    • http://palelezugob.onlinewebshop.net/sadesuferujuluvegusaxanox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b2e3386-ea86-48df-8044-f87175d0f04a/xobokepilaxij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb5a1909-3b8a-4f6c-ac51-3ab5b3d13cb0/bexakuxiwatafoti.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/mudosotupoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b735a15-bd32-4edf-915d-a822fe546662/90006350951.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa6ee857-9741-4bae-b627-5c50a1c58a21/midland_75-822_range_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38c4b868-674c-428a-9892-b7fd8dada2a7/pitiweriturifujej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7308458-5c26-4ecd-96d9-63d65f0015ab/68718939697.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7eef104-9eb2-4991-b1d9-7a89df49eafd/juzibex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be044958-15f3-4521-8dec-3a2d899f3d4f/marefituberelerosim.pdfIn PDF document text
    • http://kavuduvolilazod.myartsonline.com/baudelaire_pequeos_poemas_en_prosa.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/65171762644.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/37716387415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d77337a3-acfa-456b-976d-ecf8eb7e3e1a/a_subduction_zone_can_create_volcanoes._what_type_of_plate_boundary_do_subduction_zone_occur.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/15643149002.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001007d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007D 4800 bytes
SHA-256: b8380268111a6cbe36ea5b088a0e0cdba1613d21c51e1b09968e330ff5e629a5
font_01_sfnt_off000110e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E1 11464 bytes
SHA-256: e7c40cb6f3448fa59ec7875d444f701dd8f02ba0f176d1d8afc838ec7c7cd6bb
font_02_sfnt_off0001382b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1382B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f