Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ba13e806e9a34c…

MALICIOUS

PDF

66.2 KB Created: 2020-11-30 06:52:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0f7536af358801234dcf8b9085feb520 SHA-1: b6206be0257812474df2312282cc57366b41a37b SHA-256: d0ba13e806e9a34c042e54946396e6ea9f71be97385d2570d2ce43d67405d54d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting services, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' confirm the document's purpose is to drive traffic to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/123?utm_term=google+calendar+embed+options PDF link annotation
    • https://dutazimu.weebly.com/uploads/1/3/4/8/134878831/1590122.pdfIn PDF document text
    • https://gatilavim.weebly.com/uploads/1/3/4/3/134391542/gitem.pdfIn PDF document text
    • https://tanaxigurav.weebly.com/uploads/1/3/4/2/134266775/denesanijibep.pdfIn PDF document text
    • https://dajifavetesa.weebly.com/uploads/1/3/4/2/134234726/6726825.pdfIn PDF document text
    • https://rusekawavupor.weebly.com/uploads/1/3/4/0/134096427/vuvixegesujawanu.pdfIn PDF document text
    • https://rugalasaludazi.weebly.com/uploads/1/3/4/6/134683923/tupugokibon_pusiroxujuxuja_loweri.pdfIn PDF document text
    • https://fisalusul.weebly.com/uploads/1/3/4/3/134341538/7759719.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/9e9b9098-c0bf-40da-9ade-3eed7a13053a/power_of_the_force_figure_price_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/the_score_unstoppable_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02e44750-b81e-4ba0-83d0-1d1215e4edea/the_shoemaker_and_the_tea_party.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/330c5928-aa9e-42e5-9232-b3192dd32240/bemodivudisegep.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/vefegisaresugixibagiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e492794-7b04-4e10-9ed7-11cb5034b820/4952364996.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/24780777473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b982ac58-bb5c-48bd-bad1-90770693736f/64769306628.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/7032174194.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_off0000c6bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6BF 5564 bytes
SHA-256: d7bf57ca6823d73d203635e1d3c62f7ac54b691ef6375a2e27b95ff33d895507
font_01_sfnt_off0000d994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD994 10080 bytes
SHA-256: 6a0ce0a42a02782a321b5531134ea0b3bb4b653ae4b3eadd5acc70082279fa97

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