Malicious PDF — malware analysis report

Static analysis result for SHA-256 93bbce410cabfece…

MALICIOUS

PDF

127.3 KB Created: 2021-04-20 10:16:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 1d01f1dda5354e2e094a1cbcc156c60d SHA-1: f61bdec965763528d03c47b0be4aaed99b0e5c0b SHA-256: 93bbce410cabfecefad10ae06192044da0b6ab6daac8b546f055f78958f97c2d
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable hosting and employing UTM parameters, suggesting a link farm designed to redirect users to potentially harmful content. The presence of these links and the overall structure align with phishing or scamming attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • 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://bologen.ru/strik?utm_term=bandook+nirvair+pannu+mp3+song+download+djyoungster PDF link annotation
    • https://cdn.sqhk.co/lididiregi/oJvjhtZ/dog_runner_walmart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378175/normal_60678c30c0f15.pdfIn PDF document text
    • https://cdn.sqhk.co/pevejotomoma/O9jeDjj/tawetibojoxojilu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375075/normal_6065500867c9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408463/normal_60125b61433b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388283/normal_5ff9c4ae78399.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465393/normal_5fd17ee93210c.pdfIn PDF document text
    • http://gedawirij.66ghz.com/demographic_information_definition.pdfIn PDF document text
    • http://pasagotijaweti.iblogger.org/wikolemowavit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481834/normal_60384a77a0336.pdfIn PDF document text
    • http://tenakotete.22web.org/zilopotitinizifisisog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384164/normal_5fd639a0655a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369796/normal_5fe5bcdd17761.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofifevag/ggcQDD9/assessing_reading_j._charles_alderson.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/6e00c639-c89c-42d7-a3e6-106f17d3b054/dyson_cinetic_big_ball_animal_allergy_vacuum_reviews.pdfIn PDF document text
    • http://zekarevuwo.epizy.com/how_to_include_bleed_in_indesign.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17d12bcf-ba92-43af-a791-57c158f31371/how_to_do_half_life_exponential_problems.pdfIn PDF document text
    • http://femasusatatovet.epizy.com/nonafakirabatug.pdfIn PDF document text
    • http://dojukagufeni.epizy.com/80442319458.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_off0001b798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B798 5888 bytes
SHA-256: 6e6940a1d51218d075bbd52a64731e31f7d2d9e20d7c98484471bcae72d435f8
font_01_sfnt_off0001cbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CBB1 10136 bytes
SHA-256: 6e9edb2656f8c8961214ce6cb4fdb979646d1d94c829108deffed59a7146428f

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