Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b1eb98f4335d671…

MALICIOUS

PDF

66.0 KB Created: 2021-06-01 05:49:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 3d6547864b590be9cae9cea16537f1ec SHA-1: ec5b778c8564a208ff35482171a78aefa1ecfa58 SHA-256: 6b1eb98f4335d6715d69f0e4e0f2afde8d34af801d0c6da0e9b572bb60589cd2
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1105 Ingress Tool Transfer

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of a URL with a search query related to car sales indicates a lure to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://pixomot.ru/pbw?utm_term=toyota+hilux+revo+for+sale+in+ethiopia PDF link annotation
    • https://kugibiredatejag.weebly.com/uploads/1/3/4/3/134319346/mifaxizosor-boduvolesaperuv-tejax.pdfIn PDF document text
    • https://dopupuwupexiro.weebly.com/uploads/1/3/0/8/130813117/f2a704a9c.pdfIn PDF document text
    • https://kamedewogivazu.weebly.com/uploads/1/3/4/0/134096977/f8ca03575.pdfIn PDF document text
    • https://delidanazej.weebly.com/uploads/1/3/2/6/132681463/kopadenasevawuv.pdfIn PDF document text
    • https://rixukiwifezi.weebly.com/uploads/1/3/5/3/135392959/80113aeb77c.pdfIn PDF document text
    • https://gupoxebexu.weebly.com/uploads/1/3/4/3/134337811/7697897.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jajafad.pbworks.com/f/xupegufuli.pdfIn PDF document text
    • http://feteselulo.pbworks.com/f/achi_baatein_in_hindi.pdfIn PDF document text
    • http://zezimin.pbworks.com/f/break_even_analysis_numericals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c11d129-d927-4a86-8ee1-902ccf9b53f7/how_do_you_say_happy_epiphany_in_greek.pdfIn PDF document text
    • http://zowonixepor.pbworks.com/f/91194720705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1183b35-72e2-40e6-95d2-7584454553a3/62948185014.pdfIn PDF document text
    • http://memofemovo.pbworks.com/w/file/fetch/144437289/gigutigivugepumula.pdfIn PDF document text
    • http://paderukut.pbworks.com/w/file/fetch/144437661/chart_of_accounts_excel_template_free_download.pdfIn PDF document text
    • http://lekuzax.pbworks.com/w/file/fetch/144418746/how_to_put_onn_earbuds_in_pairing_mode.pdfIn PDF document text
    • http://kekirow.pbworks.com/f/does_sauna_belts_really_work.pdfIn PDF document text
    • http://garigor.pbworks.com/w/file/fetch/144427959/mektoub_my_love_intermezzo_720p_download.pdfIn PDF document text
    • http://nunaruribeg.pbworks.com/w/file/fetch/144415362/45084523708.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_off0000c560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC560 5168 bytes
SHA-256: 73a72345f88c8204e10378df99576731c30c811b0975736b8ac765858b25d9e6
font_01_sfnt_off0000d706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD706 10456 bytes
SHA-256: 16a06a3e922cd8ef7615f3bf83cb7c3b16ca73a3bcbd5ad354f9350db34ac6c2

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