Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba90c8ec130814f…

MALICIOUS

PDF

68.3 KB Created: 2021-01-03 15:41:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c63918c9927ecc83ec55f1454208e914 SHA-1: 7afccf556507cc642464e06c4b6b87edf16ec373 SHA-256: 0ba90c8ec130814f263a7ebb12b8e7fe31653e5ffaa97c756393419e42f5e19b
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of embedded links, identified as a PDF link farm. One of the primary links directs to a known malicious redirector, ggtraff.ru, which is likely used to host phishing content or distribute malware. The ML classifier and ClamAV detection strongly indicate malicious intent, with the overall pattern suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://ggtraff.ru/123?utm_term=how+to+cite+the+dsm+5+in+references+apa In PDF document text
    • https://cdn.sqhk.co/worupageke/yJZhhhg/rinavukesapukigekitix.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxunafifu/MAjgvhb/41972120465.pdfIn PDF document text
    • https://xakexoxos.weebly.com/uploads/1/3/4/3/134307698/feperifolusova_lanudupuk_kigopenowu.pdfIn PDF document text
    • https://cdn.sqhk.co/rularijulen/rzichgc/gigofinavinedakid.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/0a787f21-0058-480e-b219-63f20472f2b9/what_is_quark.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/090f272e-cc44-4e24-83ab-2bfd5be26758/risorutemizuxesegufibola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da8f35c1-fc0e-4796-9ea9-983fd0d50b0a/40139689025.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/android_emulator_linux_fedora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bd8ae90-332c-4440-b31d-60d7a045dfc5/spinach_artichoke_dip_crock_pot_food_network.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/the_abcs_of_real_estate_investing_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/132cdca4-94ac-4474-acc5-9f41dfb2a9d6/rockstar_roblox_id_clean.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_off0000cc2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC2E 5540 bytes
SHA-256: f612a762b55c727fe174e8a790431d3965eedd95536b6a23df088ad5cc88308e
font_01_sfnt_off0000deee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEE 11044 bytes
SHA-256: 5b7617a09cc83aa7c8b0d6ba364afa63c9a2c94e34e70ceafa81f35768488ef8

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