Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7f9af544d8b3480…

MALICIOUS

PDF

67.0 KB Created: 2021-03-15 17:29:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5ee4adc690ebd41397678a035e24b675 SHA-1: 596b96e61ae8d250396677ca8cc5231c70489e47 SHA-256: c7f9af544d8b3480a4f8346f26b0461e9010aad6286a5cebd3cafb9da0599e05
126 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to 'Energy skate park simulation answers'. The presence of embedded URLs indicates an attempt to redirect the user to malicious sites for phishing or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/wix?keyword=energy+skate+park+simulation+answers PDF link annotation
    • http://circulshtangcalip.website/puloxorezofrujjv.pdfIn PDF document text
    • https://gudosotavuna.weebly.com/uploads/1/3/4/7/134722070/zurep.pdfIn PDF document text
    • https://bikezurikol.weebly.com/uploads/1/3/4/6/134612173/1229308.pdfIn PDF document text
    • http://leftoutclub.com/kipebaguxirisumipellpn.pdfIn PDF document text
    • http://xiwupulo.medianewsonline.com/nesabofebopopolug.pdfIn PDF document text
    • http://bullbananavannaone.xyz/48501664476baet9.pdfIn PDF document text
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/wofogoroximero_lomew.pdfIn PDF document text
    • http://save50it.pro/rigeresixugofoxumiwetovzh21.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pobununebizi.epizy.com/fundamentals_of_calculus.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/kawaks_emulator_apk.pdfIn PDF document text
    • http://pizitibasowu.atwebpages.com/23505206888.pdfIn PDF document text
    • http://dumatefofexulen.epizy.com/13206502513.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/i_am_the_purple_guy_lyrics_clean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/621fdf3c-e239-404f-9619-8a0efd70c9bc/why_is_ctrl_not_working_in_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/926d5f65-1d94-4db6-988b-a99ee918d668/bosch_vision_500_series_washer_error_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/80512183109.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/non_functional_requirements_specification_template.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_off0000c829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC829 5356 bytes
SHA-256: 6fd1947f93b8ef7003fcfd49456348d96dfafb184d3dc100c2b318cc291ef2e1
font_01_sfnt_off0000da70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA70 10576 bytes
SHA-256: 531f7a264324787ff334344c4533b306346093d1c70db68c19f3a83e69ded33d

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