Malicious PDF — malware analysis report

Static analysis result for SHA-256 97c09b09b3a3f96a…

MALICIOUS

PDF

91.5 KB Created: 2021-03-09 15:11:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7e1fb7227d5d9ffa09bc5c71193ba0d7 SHA-1: f7f1b7b04d6de6a9cde3d4b18f4a503c80f3b4f9 SHA-256: 97c09b09b3a3f96ab38cf6c7f28f5666d7547bf47813bebb886df58b606ee913
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URIs, with a significant number pointing to disposable hosting. The primary purpose appears to be directing users to potentially malicious or phishing websites, as evidenced by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://soxebez.ru/aws?utm_term=yard+machine+lawn+mower+idle+adjustment PDF link annotation
    • https://cdn.sqhk.co/wetotuluxe/iiifhjb/jizelozisabup.pdfIn PDF document text
    • http://picsonair.com/database_manager_job_description_templateptnir.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/chg4DFp/90605034885.pdfIn PDF document text
    • http://ita-bio.space/contact_lenses_brands_pricesc7d4s.pdfIn PDF document text
    • http://uscovidcharts.com/57529759253h5m1k.pdfIn PDF document text
    • https://cdn.sqhk.co/kosadara/jijgeie/jukaxibo.pdfIn PDF document text
    • http://menformula.xyz/heil_furnace_blower_motor_speed_adjustmentocvws.pdfIn PDF document text
    • http://bapatavusirave.mygamesonline.org/kijusuzamijaxowedef.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirurafixi/igEjb15/bike_racer_jacket.pdfIn PDF document text
    • http://budivev.scienceontheweb.net/zubanoporufuzi.pdfIn PDF document text
    • http://1-bog.ru/20613855853aj60d.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/rTcEggL/xodekod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://ab25a8b3-4d80-4d4b-93a1-c1347014fa7c.filesusr.com/ugd/8d0191_c56266a84b4143419403ad4d299762cc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/73923d58-9ac7-47e4-8297-4acbb4ff2a1c/how_to_handle_conflict_resolution_in_the_workplace.pdfIn PDF document text
    • https://5d3a357a-25b2-4459-9cd8-210b235f7b36.filesusr.com/ugd/45e30f_427e1c969a0546cfaee7f46b9e9ccac7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b36b5315-a6db-4f10-9bd9-7e20fd5bf810/itaste_mvp_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/021da197-fa43-4ff3-b112-bb895bb26bb1/business_communication_course_syllabus.pdfIn PDF document text
    • https://065b66ee-25d8-4381-b309-094abc4d823c.filesusr.com/ugd/2703e6_8e4265acfb3e4112abe2e082084a8dba.pdf?index=trueIn PDF document text
    • http://roveramo.atwebpages.com/bawajufut.pdfIn PDF document text
    • https://c72a6d71-2fad-4f5a-8b7a-a7c165485bce.filesusr.com/ugd/a4966f_695fc15e58e74daba19f9894f8d803a9.pdf?index=trueIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_b9e04e9ba17e447c8965aa6a4fd97d34.pdf?index=trueIn PDF document text
    • https://ef9d90ca-5811-4a1c-810e-75bcfae60121.filesusr.com/ugd/a33af7_7bdcfc3ebe544966ac3bb05ec4561bad.pdf?index=trueIn PDF document text
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_0e6a1e43381449a481f32345cc44c167.pdf?index=trueIn PDF document text
    • https://cee4a208-09ac-40e0-983f-4c2cc776acbe.filesusr.com/ugd/5ed537_9d4fce3b7c3841379dceece55d1e025e.pdf?index=trueIn PDF document text
    • https://5071cc05-3fa2-46b1-b944-d2523ca4b51d.filesusr.com/ugd/62e2c1_ca36b73a97d74b5b83f2d00e2e30d4a9.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABD 5188 bytes
SHA-256: 415876ebc56eda3e711feaffe79d74a203eb05125b435984287d36376c5c58c4
font_01_sfnt_off00012c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3D 11184 bytes
SHA-256: 8dd30a5a7afa50e68877e70af48ab673616d5dc2112e66222a1ab8f550e56a00
font_02_sfnt_off000151d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151D1 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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