Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc201590bd5ec1ec…

MALICIOUS

PDF

85.1 KB Created: 2021-06-26 19:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8c663ab0f68697405d6c5c137a2a9539 SHA-1: bab792952747669c9cb0093b10ec0c3a9859311d SHA-256: fc201590bd5ec1ece08c03beea4bea5d6dca6df5dcbb2ae211f749e74a331ea9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous compromised websites, many of which are hosted on disposable domains or utilize WordPress upload vulnerabilities. While no scripts were explicitly extracted, the nature of the link farm suggests it is designed to facilitate phishing or malware distribution, aligning with the Spearphishing Attachment technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://garmagostaran.com/Upload/file/44129380252.pdf
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/2d653b51db42658937eef38efecd2572/lepavefipolejubuvidaledi.pdf
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/vb1lsjcds1qs4e6tp1u3io8ck7/10625235827.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16091adcc5ef5e---dosod.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/7194o0dk8idcg53tdpmbo587r1/xofejerifeverexolexi.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608622dda520c---39873774917.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/qik5jl7gsmk6f5kvemm3kcehvd/55779024945.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ac481c09cf8---99980987556.pdf
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/55007087789.pdf
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fb15659a0---66246188062.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/hnei95nqrh325kjdao5h7t0gus/41786836968.pdf
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/bsmmpllanvd818vn0ddpors2og/kotizazilukoxenikagovunur.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f631cce6da---78115551242.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/103b285f80943b5e81326e5422978b05/22439628946.pdf
    • http://luatsubienhoa.com/upload/ck/files/xanazexevugunuzilafa.pdf
    • http://riverbendhay.com/clients/4/4e/4e1cbd84181290ddb66fb035c9950ff6/File/mijosarawiv.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a750d0b39af---velas.pdf
    • http://akgikorea.com/file_upload/fck_upfile/file/gabemasugudibikugo.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/02snc32is340u94su4brk5914i/72713359895.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609471ad2951d---62685765894.pdf
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/s8p1e12udckf5bu5v4juqeieu4/91407098848.pdf
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/dsvthgrlvqai8acd75aukcd5ru/jebudabebijig.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900f54579b3---delujomebejudozafaxebovi.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/kkrqi20sd3ncv3s5fe290tq0rn/13926964596.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=cat%27s+tail+puffs+up
    • 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_off0000eba2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA2 16792 bytes
font_01_sfnt_off000103b9.bin
777618bce6b8cdc3241e74257af68f3230ff51670139edfe2ba72bf3444b8660
pdf-font-stream PDF embedded font (sfnt) at offset 0x103B9 10060 bytes
font_02_sfnt_off00011a45.bin
90e7b9b51a3213a278d8537112a7f605b95e3d1c78e0ef707f2fdbe17f5e9c01
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A45 16844 bytes