Malicious PDF — malware analysis report

Static analysis result for SHA-256 c12c5bfee93179b3…

MALICIOUS

PDF

112.8 KB Created: 2021-05-10 15:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 28e0786bb6461cbfe1cf058376cf7be6 SHA-1: 2418d9515a70f140fd35756be2680c5c20a36440 SHA-256: c12c5bfee93179b332e806e5c2a798734ac6733224f7e3c4ce6b1da02047d82d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' suggesting a large number of outbound links. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically classifying it as a phishing trojan. The embedded URLs and the document body's deceptive question point towards a phishing or scam attempt to redirect users to malicious sites.

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://druttle.ru/strik?utm_term=what+is+the+driver%2527s+license+number+on+a+permit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4493867/normal_6052c14d72904.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374848/normal_602b68a1d9281.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453560/normal_603eb6249c5df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451954/normal_5ff0858330ead.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453740/normal_6023d54a3dcd6.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/bisiku/dasuduxovofuzupazisojogus.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/counter_strike_game_for_computer.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/7311186893.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/fukipovekevetofiko.pdfIn PDF document text
    • https://4192d618-ecd7-4808-8485-efd4d6773ded.filesusr.com/ugd/17a5db_3e8b37cf77d84d23b51ee869af22788b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/netgear_arlo_baby_manual.pdfIn PDF document text
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_610e89bcded14fe88f61cad3a9c4c8ee.pdf?index=trueIn PDF document text
    • https://69669160-cc20-42a3-bfef-e1e1fd1f8163.filesusr.com/ugd/8094a4_f274dfb6cd204e19ab698f310915723c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/cs_1.6_cd_key_25_haneli.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/63573338612.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/16171903703.pdfIn PDF document text
    • https://s3.amazonaws.com/kimone/ritasumozomevijoruj.pdfIn PDF document text
    • https://e905a76e-7bc1-418c-be29-e8eda1603e86.filesusr.com/ugd/3fb32a_c6c50eea573448e88f31bd2d5f0a8818.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/reliponizilidu.pdfIn PDF document text
    • https://ac685e6e-6442-44c0-91a1-b3a367e79ef2.filesusr.com/ugd/ce77c6_9d0234e2484343d9b277e5ee7f3a16d6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/refanubokurofem.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/horror_movies_english_hd.pdfIn PDF document text
    • https://ac4cd5cf-e861-4b1b-a585-e47049f737a6.filesusr.com/ugd/843280_1439afb7d064492faaf69b1ccf1f23d2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/beruribemidaritisu.pdfIn PDF document text
    • https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_d988bcf711874b79ab570a9fe262ead6.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_off000176f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176F6 5560 bytes
SHA-256: 54f6fdc70d701ca0b5dafae28e6fa59a94d5da568836b84f6683f3ada3887a1b
font_01_sfnt_off000189c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189C0 12212 bytes
SHA-256: 04bc3627b121a91ef4568fc2b463c0d478237abca483e366057f951a426371fb

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