Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8872e60739a1d29…

MALICIOUS

PDF

82.7 KB Created: 2021-03-29 02:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 6c191b51b40778304e7362b9d7fd276f SHA-1: 5259dab2fb8de9dee94cbda67a09a766061a0d43 SHA-256: c8872e60739a1d29aa93b9791c4a4ade3d7d0f54f66faad456ab6bd781623b68
126 Risk Score

Malware Insights

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

The PDF file contains multiple external links, including one that mimics a search result for technical documentation, suggesting a phishing or malware distribution lure. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for such links. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://lozipotod.ru/award?keyword=solidworks+electrical+2020+tutorial+pdf PDF link annotation
    • http://sokixatov.mywebcommunity.org/nutritional_information_on_taco_bell_chicken_chalupa.pdfIn PDF document text
    • http://zebiripu.mygamesonline.org/aws_certified_solutions_architect_exam_dumps_free_download.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/bankersadda_current_affairs_august_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473052/normal_5ffbdc6f223d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403141/normal_5fd7bf8d7ea1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481663/normal_601b88d2a943b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422893/normal_5fdc62524daae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420745/normal_604e19e30b0a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490519/normal_604efec1e4746.pdfIn PDF document text
    • http://miwuzobi.sportsontheweb.net/aristteles_tica_a_eudemo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494888/normal_601516b459ee0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422890/normal_5ff71b54bba84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458628/normal_5fcf4491e8cf5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dff5ca06-dcf7-4a10-8319-5f20622e44ca/79024472003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc535861-2540-406b-aad1-ad1026e5cdce/85922200614.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/apaharan_film_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/how_to_get_a_new_child_support_card_in_arizona.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/honeywell_t4_pro_thermostat_user_guide.pdfIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_5013fea145e44e43b7bb23afb19060fd.pdf?index=trueIn PDF document text
    • https://feedbc21-cb93-402c-9ae2-3476589645d2.filesusr.com/ugd/f3ecbe_d34158ecb330444a8b252720f537e294.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/67ebeb2a-c39b-45a9-969d-a92847aee6ea/68222097677.pdfIn PDF document text
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_5a86e4dcd2774c159c9a00da8b73a702.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001005e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005E 5684 bytes
SHA-256: 37f459c6c298d49b5f174e96b7266b4ffc7c80681f99236ea9812656491ec2c7
font_01_sfnt_off000113dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DC 11864 bytes
SHA-256: bf898c40d07bbe49daf7dc1f4e27d0d2fa8a2ca64ac5882a2f826a95dfa75ae7