Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dfe8274a7513d0e…

MALICIOUS

PDF

93.8 KB Created: 2021-02-17 00:33:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 3117487c9dde873a3d2ad2bb01671f64 SHA-1: 1698f2894b45df244b0c77a6563f645593590144 SHA-256: 8dfe8274a7513d0e4a0f8e1ed72a129106e9859493f5b065b005a39c5ca4192f
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs and the PDF's structure point towards an attempt to redirect users to potentially harmful websites, possibly for credential harvesting or malware distribution.

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://druttle.ru/wix?keyword=ddo+leveling+guide+free+to+play PDF link annotation
    • https://cdn.sqhk.co/tijinujul/hhjj3ha/one_man_down_band.pdfIn PDF document text
    • https://cdn.sqhk.co/sekeniti/getijmn/blaze_and_the_monster_machines_party_decor_ideas.pdfIn PDF document text
    • http://dhl-order.info/955218693075izzb.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/lhfrhZF/jotemeruzopox.pdfIn PDF document text
    • https://cdn.sqhk.co/wifavizen/jjjhjgf/dead_trigger_2_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bibilofefi/dwW8vif/london_tourist_map_download.pdfIn PDF document text
    • https://xitarowax.weebly.com/uploads/1/3/2/6/132681505/rozezube.pdfIn PDF document text
    • https://mewatejo.weebly.com/uploads/1/3/5/3/135322937/4832406.pdfIn PDF document text
    • https://cdn.sqhk.co/sututidogo/Dibj7YZ/spirit_riding_free.pdfIn PDF document text
    • https://kumobavubisu.weebly.com/uploads/1/3/0/7/130775432/fc0329.pdfIn PDF document text
    • https://dowanudamedi.weebly.com/uploads/1/3/1/3/131398164/mazobuxo.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/lsfjcDk/54304568024.pdfIn PDF document text
    • https://somirurawepaf.weebly.com/uploads/1/3/1/3/131381963/kurive-nuvifox.pdfIn PDF document text
    • https://sawuwirepugasup.weebly.com/uploads/1/3/0/9/130969548/2049909.pdfIn PDF document text
    • https://podonajoji.weebly.com/uploads/1/3/1/4/131438761/bf0e60f5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://setowibuvi.epizy.com/9061688134.pdfIn PDF document text
    • http://beranaja.epizy.com/adobe_flash_cs3_animation_software_free.pdfIn PDF document text
    • http://karababeso.rf.gd/fujitsu_mini_split_blinking_green_light.pdfIn PDF document text
    • http://jetuloloz.epizy.com/specialized_enduro_2013_frame_size_guide.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_off00013268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13268 5192 bytes
SHA-256: 86685ab3a419206b5bfaa924bd5b00fab42cf3032b50ab94deb44f81d49edc2f
font_01_sfnt_off0001443d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1443D 11072 bytes
SHA-256: ca42628158131bae95ebe4a170650bdf4e8b0468456b5f81718ba6d9441f76b9

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