Malicious PDF — malware analysis report

Static analysis result for SHA-256 6784804d36c93354…

MALICIOUS

PDF

94.1 KB Created: 2021-03-10 10:07:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 869641977b810e07ed7c5b77b595af01 SHA-1: 0e40dcab2560f43ff037d6bf755d1647062c3bd3 SHA-256: 6784804d36c933548d1295bcedc26e12bff1eac005ce6cadbfdc979d948a5d9e
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 phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The embedded URLs are likely used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jacksth.ru/wix?keyword=how+does+a+nation+restrict+imports PDF link annotation
    • https://tawatoxox.weebly.com/uploads/1/3/4/0/134018263/56616.pdfIn PDF document text
    • https://kolokizegilo.weebly.com/uploads/1/3/4/3/134370221/9e0a70425c55a74.pdfIn PDF document text
    • http://kofoxirozagitu.iblogger.org/sixefifigedetu.pdfIn PDF document text
    • http://puxekera.22web.org/68720748264.pdfIn PDF document text
    • http://fulitip.iblogger.org/38938977909.pdfIn PDF document text
    • http://novuzigekisev.iblogger.org/ways_of_the_world_3rd_edition_chapter_7.pdfIn PDF document text
    • https://kajizifobizixa.weebly.com/uploads/1/3/3/9/133997117/razabuxama.pdfIn PDF document text
    • https://tabajojimito.weebly.com/uploads/1/3/4/3/134317549/revuwuviganunon.pdfIn PDF document text
    • https://nujokolove.weebly.com/uploads/1/3/0/8/130874035/fitudixuzese_fobinaxap_lafujemuwutata_todor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_11e5edf381aa45bd8734243d7f0d08e5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9efa1af1-c2a7-4cb6-9346-8f6370fb86e0/zefojudoru.pdfIn PDF document text
    • http://seladetitogar.epizy.com/46895506240.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/25471247477.pdfIn PDF document text
    • https://bd15da75-ee01-4ad3-8b22-4778d9929f37.filesusr.com/ugd/1abc29_274c9b3df3694b9fb7601bf68face8bc.pdf?index=trueIn PDF document text
    • http://masatajomalopu.rf.gd/77353500636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf0bee18-6fee-4b3f-a6ba-38660141ebc1/29753064406.pdfIn PDF document text
    • https://f1c0478e-57b3-422a-b8eb-433964b677d2.filesusr.com/ugd/16c17d_e130d680e5da4a8fa18981b8933506b0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/38269946489.pdfIn PDF document text
    • http://zexikewilupime.rf.gd/windows_10_says_there_are_currently_no_power_options_available.pdfIn PDF document text
    • http://gugakalorezo.epizy.com/ribasukeveb.pdfIn PDF document text
    • https://1c8fadd7-09eb-4d2b-9d42-8e747ba5ce52.filesusr.com/ugd/60625b_5ed5f674fde04682ae6d57404755a40a.pdf?index=trueIn 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_off000133c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133C7 5240 bytes
SHA-256: f21c5f21acb07581efe77c5507fc190e3b4827c20053737b0c4e5fe2265be559
font_01_sfnt_off00014595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14595 10872 bytes
SHA-256: 806831933cc71dcf501ec067cb9abe6f1a64956185831d550d6eff51891b8c94

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