Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd64d551ab159e70…

MALICIOUS

PDF

87.4 KB Created: 2021-07-30 21:36:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 08838706a80823ec4ae0dc9d64660a1d SHA-1: 2a4f23408274f65972d72470a53f8dbf243e4e22 SHA-256: fd64d551ab159e70e29dbaf43dadeca40ae6895b4bd35f5f3fb84b0515ba930d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting it is designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://allytemp.ru/uplcv?utm_term=orbiting+jupiter+synopsis
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/d53b22de9ca79ae968a395a18a1b42ca/51164327208.pdf
    • https://brianhigbielaw.com/UserFiles/file/59758511673.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a66f22a6dab---sofasakugodelapi.pdf
    • http://gdgom.com/upload/file/210703084510122676nae1leyxo3du.pdf
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/af02508db2309ef7f6d355bddf003c29/dikolopebojegoxagabata.pdf
    • http://clubmaniacr.com/campannas/file/nijerewigudote.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077cf739d75d---50681898464.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160984bbf237fd---65116961869.pdf
    • http://goref.ru/files/file/papukulobinujavono.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/0e8bf797fde7a393b67ffc60761c6dd2/703284008.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/mosep.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/b32ecea257173978eb50f6b299da0d2f/2635358442.pdf
    • http://amphorabeautyclub.com/campannas/file/fematamenegalil.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d59d87693---51485854606.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/30b92ede1ab5c2843baf27dffc2ac72e/wufovetijinurejulinalofi.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160afa7b3ee1e1---27833990337.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c5969d7ce06---18941915076.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887a2e1cc2e---nosisoberi.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7ffd33c9a---direziweniworanopukurefu.pdf
    • https://securitegenerale.tn/userfiles/file/guwinizisukipu.pdf
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/2c436aa8728f1fd3c3d72a970b9b49a3/valunudoxomuxa.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/fa4f4e05d87e34a98ea3ec0cb4ed4c7c/8946907537.pdf
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b807b2694---86153104368.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efca.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCA 16792 bytes
font_01_sfnt_off000107dc.bin
342c4e6b4a2d300b0484f54bf76eb788a6cc8d32c1b7219017f1ebb7c36c90f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x107DC 17424 bytes
font_02_sfnt_off000135c2.bin
a7d086a03f3e6a577ddb7a8f9dff94dfc905face768ba2e7ebebcbd76e57c3ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x135C2 10728 bytes