Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cdc041ddb431c4e…

MALICIOUS

PDF

78.4 KB Created: 2021-05-02 20:24:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 127a015ebcd1cad1ea2647e6b908f8fb SHA-1: 9f4e669d23dbf42cf2001187d329c7db63ec0f7d SHA-256: 0cdc041ddb431c4eefb85423bbdadd9188183bdc95ab0cc92d43044ae4dd8d1c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO poisoning or redirecting users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. The embedded URL points to a domain that appears to be part of a link farm, further supporting the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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://kuzutuzo.ru/strik?utm_term=how+to+load+a+craftsman+staple+gun+68514 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4415537/normal_5ff5c6d3c9ae8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527042/normal_6050d56fd3154.pdfIn PDF document text
    • https://cdn.sqhk.co/kokuxisa/Bjfhegi/33799884367.pdfIn PDF document text
    • https://cdn.sqhk.co/wutalididow/YgiuYLf/xilopadobuvova.pdfIn PDF document text
    • https://cdn.sqhk.co/fezemepusap/jjedzij/drive_in_movie_theatre_lakeland.pdfIn PDF document text
    • https://dosabaret.weebly.com/uploads/1/3/4/8/134861273/liturofusufop-kawax-fagilovexiguna.pdfIn PDF document text
    • https://debawusajatowi.weebly.com/uploads/1/3/4/7/134707072/rupoxifezufopupi.pdfIn PDF document text
    • https://sasasukaga.weebly.com/uploads/1/3/4/6/134624721/kozow-gufitesavi-fojumupamijus-timab.pdfIn PDF document text
    • https://cdn.sqhk.co/wugolekufo/PidhhlM/49875410202.pdfIn PDF document text
    • https://cdn.sqhk.co/vopuvafamiw/j1YY4Wp/maze_ransomware_iocs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375076/normal_605da44dcd731.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379718/normal_6024bf052fca5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jezobasit/app_updater_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/computer_science_programming_basics_in_ruby_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/278be95d-7df1-418f-9a21-da772f1765d1/77687895622.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97a2d4d7-92db-45d6-9863-d1dcb2f634c5/can_turtle_beach_800x_work_on_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/xitudiga.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/51059071473.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/powixeti.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/first_things_first_book_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/refractory_hypertension.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/what_are_two_requirements_for_karst_topography.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54770a2d-5bcf-4cfa-bd75-ba6f03f9952c/tudapebagorufunuf.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_off0000f07f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07F 6140 bytes
SHA-256: 032b10c3c3c973154223d570c9d28b93fc8cc7219deb1181440b20b2954b2caf
font_01_sfnt_off0001056b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056B 11312 bytes
SHA-256: 00ad892886a144773d6f1a07790dfad50ee6e6f1516fb1fd8f8ce25ca48c98ce

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