Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af9b2db8c210369…

MALICIOUS

PDF

73.3 KB Created: 2021-06-29 00:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 179bfe7a83bb6f9469358fed1bf33fa1 SHA-1: be6f87bc756963501416612ae99d9468f629c948 SHA-256: 7af9b2db8c21036924545050ddcdf6e16d4077cdb492d83a7f6b5120cb065351
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal that the PDF contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's designed to distribute further malicious content. The presence of multiple URLs, including one pointing to a raw IP address, reinforces the attack pattern of luring users to potentially harmful resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/4aa0310a43b4f7dbdc5c764d2ac559f9/fezakopalotavopupej.pdf
    • http://157.230.241.115/image/upload/File/jafomurigudi.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a4badc961c5---pifexemosazuvupobawemi.pdf
    • http://agiusfuneraldirectors.com/files/file/16819436685.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4bdfd64f5---2709890506.pdf
    • https://hijaulumut.com/contents//files/fifitisusudilenadoz.pdf
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/d66dd8f6b709e53ebb9b0475aca9cf88/33252939107.pdf
    • http://amuseonline.com/absite/userfiles/file/xiruxazipewijuzivisa.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c966111e53---zufupifarikugoz.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160afca572ba06---97155501579.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160839554a678f---58629456048.pdf
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/3db116feb3bbd5145907d49fcc61b607/zumirelasotufugasa.pdf
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/lirimefiwaniritigaxewusi.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160acf17a544bb---diruwewupo.pdf
    • http://aristosaigonhotel.vn/uploads/files/ruzewepebewevugopa.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609496efd8c22---52337965825.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/f1bbe463a8a231af9ebeebdcf80089b7/28067806542.pdf
    • http://berbun.com/user_img/file/gebawegofafa.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/200ae2882692ceb91e69e78a7c9cd4ac/jiruwanebegujil.pdf
    • http://kstarsmall.net/userfiles/file///suzuzivixakuninepuduta.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607abce5bb070---86306432187.pdf
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e8d3b7a08---89164542888.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/qedhamsunam23liemapano07fm/nisexilop.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16087838fd137a---46004530548.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=diploma+in+chemical+engineering+books+free+download+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_off0000bb43.bin
94ea591c4c14075bcfd5d57a5ff0681ee201c741876b6d4a9e055818fc25e1f6
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB43 16692 bytes
font_01_sfnt_off0000e59e.bin
0a7f825d816f675ec0f901d4a68215e058f166a7f3a289fe828318576d480887
pdf-font-stream PDF embedded font (sfnt) at offset 0xE59E 11288 bytes
font_02_sfnt_off0000ff85.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF85 16792 bytes