Malicious PDF — malware analysis report

Static analysis result for SHA-256 000c608766d52156…

MALICIOUS

PDF

79.2 KB Created: 2021-03-16 00:32:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5a5687ce1d4bb50ec9940b31daef6dc5 SHA-1: 3255ccee3278ca9affcb6b05d3411627a4d0af77 SHA-256: 000c608766d52156931f25e03514ba98edf1ffacc7a03109548caee197944b84
244 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting services, suggesting a link farm or phishing attempt. The document body, though partially corrupted, includes a title related to 'electric roaster' and metadata indicating it was generated by wkhtmltopdf, a tool often used to create PDFs from web content. The presence of a malicious redirector link and ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=how+to+use+an+electric+roaster In PDF document text
    • http://teksol.xyz/carl_sagan_pale_blue_dot_videosxo41.pdfIn PDF document text
    • http://winoorama.website/688722430853bkf.pdfIn PDF document text
    • http://copyrightshelpscenters.com/26824450879uu0lg.pdfIn PDF document text
    • http://vinnipoh.space/sun_joe_xtream_pressure_washer6tmbp.pdfIn PDF document text
    • http://keligekixebar.22web.org/zisesapejawot.pdfIn PDF document text
    • http://geniusenglish.space/wigokkkx57.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xoluriwibifezoz.rf.gd/nutavojad.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/torixanisitonafaderudela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1d57f1e-bab4-410a-8fd4-d399da3b11ad/self_introduction_in_job_interview_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8694778-c215-439b-9632-7f9fd4ab8f00/gutujexexokidukuwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81e3b90f-835c-43e6-ab23-f01de1faed33/9171972013.pdfIn PDF document text
    • https://fd7a53fe-11c1-4e60-83ad-ac1bb997268f.filesusr.com/ugd/5cf23b_4f7cc945d34644b8b3775799dbe0898c.pdf?index=trueIn PDF document text
    • https://234a0c07-d908-4261-bb83-16b3c96a9b04.filesusr.com/ugd/73e0e6_b58fbc2155084d58aca3561699ba216d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c1479ee-a1d9-4ed5-a591-52f11f26343a/insinkerator_badger_5_garbage_disposal_stores.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/ice_sheet_glacier_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4da6aaf-5a9c-4ee2-ae21-2e9718379136/evh_5150_iii_combo_manual.pdfIn PDF document text
    • https://18d8f76e-0bdd-4b96-b744-fee987eed1b0.filesusr.com/ugd/1486c8_69d155d9187841ebaae8865835894fc6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2689e669-d0ed-4c3f-b71b-d53a28ba0c03/82444564716.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77b0ca4b-cd8f-480c-92b0-33b21077f73c/samsung_smart_tv_6300_32_inch.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/53380974219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69e79d4e-94bc-4dfb-9df9-5eed5d010385/vutolafoxosivupofano.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/best_agatha_christie_books_ranker.pdfIn PDF document text
    • http://newewixojarulup.epizy.com/75046505655.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_off0000f8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B1 4848 bytes
SHA-256: 0433cddc03503e3e3e5e8b5182b623bfafc692da44a8e9b671a3ca056d13c269
font_01_sfnt_off00010947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10947 11596 bytes
SHA-256: c6fdede575420514b4eea732481f65c04ad9c25bfbe1442038d3a21033428593

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