Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd14cf3244f4a115…

MALICIOUS

PDF

97.4 KB Created: 2021-03-17 09:14:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9c1475a22c7fac3402d8065a72be0c6f SHA-1: 2319ed71eb2e10557a09f70189f72ab7e9bb3545 SHA-256: dd14cf3244f4a1152936debf5688f24dda85dbad82c444031e239be702ebfe0c
154 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical alert for a link to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The primary IOC is the malicious URL, which is likely used to direct users to a phishing or malware download page. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://dafemum.ru/strik?utm_term=the+chemistry+brand+hand+cream In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371787/normal_601a5208e25f3.pdfIn PDF document text
    • http://tonufunevozapiv.iblogger.org/vutilibudukopajuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473616/normal_5ff677929df6d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460678/normal_5ff42b6fd33ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368976/normal_5fec457f31b95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465277/normal_6005740cad3c6.pdfIn PDF document text
    • https://degexaxi.weebly.com/uploads/1/3/1/4/131406510/wobugeso.pdfIn PDF document text
    • https://rakevuxex.weebly.com/uploads/1/3/4/0/134040666/pokorenixefalew-felupisom-xudax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450719/normal_6043973d0ae4d.pdfIn PDF document text
    • https://sudodufutela.weebly.com/uploads/1/3/5/9/135960501/9542626.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373778/normal_604d9092255b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450240/normal_5fe3e9a1eeee4.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
    • http://zawenorite.rf.gd/stihl_bg86_carburetor_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30f6cadc-ca4e-4912-8b83-63ac88a7e620/12897294004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b5baf53-fb42-476a-ba89-24052b45e01a/g_shock_ga_110-1a_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29da1163-eb6f-4b2a-9369-1884ea9caf57/28948716561.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3db759e-61d2-4696-be54-d00d76640d88/how_to_connect_netgear_extender_to_5ghz.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/bugebudi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fdc4785-847f-46a3-9373-d5180d8d9329/39684524622.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/jonaroxototov.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/canon_eos_6d_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/salaam_rocky_bhai_full_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/20779735114.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F0 5016 bytes
SHA-256: 18a016bbdca25803c2a2936255995cd4d452a3e7c6d351e0e3f796eb3e0c31d6
font_01_sfnt_off000114c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C1 2356 bytes
SHA-256: 784a9218609ca680b84192b5be16f9152034d5336e498b68f90aae4c9511b360
font_02_sfnt_off00011f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F44 16220 bytes
SHA-256: ab1ecb0a28d1ddb3fd6d5fd69f0a279bfb4d91eb6478a1bd26068b9b1e7992e0
font_03_sfnt_off0001514c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1514C 16344 bytes
SHA-256: 9c47a8ecf7103172530608de19fa11afb8a035ab51042e9cb8c6809f09ebb189
font_04_sfnt_off000166c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166C5 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e