Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf14560857a6724…

MALICIOUS

PDF

84.9 KB Created: 2021-05-11 03:30:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 6707f728ef3cb440c6c10a0341bdd956 SHA-1: ead3ef3dfb2e227dfb225fd5bd9a6dffe7ab8963 SHA-256: ccf14560857a672420f310455119474688d5951d6e8a84997e0918d2e1a02278
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm designed to redirect users to external sites. The document body, though heavily obfuscated, suggests a lure related to 'Black and Decker digital convection oven recipes'. The numerous external links, including one to 'xajibur.ru', indicate a probable phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/strik?utm_term=black+and+decker+digital+convection+oven+recipes PDF link annotation
    • https://bobefadapuxat.weebly.com/uploads/1/3/4/8/134858353/9276201.pdfIn PDF document text
    • https://bazewubudib.weebly.com/uploads/1/3/4/7/134731154/xumafoviwiralobomu.pdfIn PDF document text
    • https://jorojesa.weebly.com/uploads/1/3/4/8/134861508/diruz-jijefedoletuxet-zenosaj-durufal.pdfIn PDF document text
    • https://povisegidugukab.weebly.com/uploads/1/3/1/8/131871963/jeporojo-padara-legowelamapedi.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/03e54c14-3610-40df-9b5a-c4fe68709751/wonizunuzosabav.pdfIn PDF document text
    • http://wilurimidolajej.rf.gd/msc_bellissima_deck_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a811b6bf-f925-4430-8891-11b64c532cd6/dewezemaneb.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/vovap.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/pirubewotipopibeboj.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/fedededalibego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6e43b88-25a1-4f70-b487-c327bd375d40/85415037994.pdfIn PDF document text
    • http://vegiziguso.rf.gd/how_to_use_a_aroma_diffuser_from_5_below.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0e1e74d-5c21-4e65-9c4a-f7d9ad4305a7/jumping_spider_green_eyes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18973de3-a937-4e0c-969b-741c85cd1e69/vegimawevijuvunewefebete.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/jatej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eccc8fba-e18e-4083-8b88-c4c25fe48778/26229340255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de95e619-19f6-49cb-af6b-946b933f5d34/cisco_command_switchport_mode_trunk.pdfIn PDF document text
    • http://sobajagas.rf.gd/rudotopen.pdfIn PDF document text
    • http://jeburam.epizy.com/73045847433.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a41f784a-8984-4770-b86e-569a1a409a3a/7029909011.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/self_guided_game_of_thrones_tour_iceland.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_off00010c8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8F 5416 bytes
SHA-256: 035b407ee52f8966d2fbdbe684e9b1d979e64a580e4ca025959388b5221ea022
font_01_sfnt_off00011f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F14 11452 bytes
SHA-256: ae79a8620fc2dcaaa1832a376b5c858a7022e3d5d5aaf071790c9fef73f7cddf