Malicious PDF — malware analysis report

Static analysis result for SHA-256 713ede22a8aeef99…

MALICIOUS

PDF

73.3 KB Created: 2021-06-27 00:10:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c864b923383cecdf103435ab590fc735 SHA-1: 31859e2dafba90f2f3db432ba659cdd1f43593f3 SHA-256: 713ede22a8aeef99ff58b3af051f70f30d29cffd8d71cd37ba41d3f588f33115
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting. These links likely lead to further malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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://enidbtwcreunion.com/clients/5/52/52e94d62e82ff66504c7d921fc07bf70/File/67083426345.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160983294536a0---71604059408.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9e0e75ec8---34390631887.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609288505c556---72590502498.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b85a0b7d97e---kidikaketukogefabi.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/lud9kgu3ubmg7h23pham15bas3/3786288796.pdf
    • https://advantagelic.com/singhania/downloads/file/jiloluje.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16083aa2298efa---nefugu.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/df80beede0c904d5ef790f27e675a627/jakulapeboriponarisam.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/8998160886.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/n2r5j4i4c9rp9mkp5uu6j2vtu1/kifagavikug.pdf
    • http://ahchala.com/img/file/kikuwaruxowixipopi.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160baaf17525c4---82298768169.pdf
    • http://gwtcs.org/Content/uploads/files/zerirevos.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607579d65dd92---begalowised.pdf
    • http://ecogestval.com/userfiles/file/limirokurezogilolavawotiz.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5eb88b17f---14044259344.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/da980ff1e4377f081d6defd418ef0206/gopubizigeronedetib.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160be3600299e9---lamopixedurobesuwavafe.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096330317296---josifuzoxirewafidesev.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160708671ca511---zuxeva.pdf
    • https://biocoils.com/img/file/gumovigujasopaxin.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094ab2187485---ruvudobikalapejibeb.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c19bf92deba---81093320372.pdf
    • https://lamthong-marchph.com/piceditor/file/42493428227.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/1f85f8862322452d3c9af3ed91563679/vizifoxaxij.pdf
    • http://ncabhsa.com/clients/875427/File/72231576127.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=notre+dame+phone
    • 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_off0000bd3d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD3D 16792 bytes
font_01_sfnt_off0000d54f.bin
fc10a329eecd99ab723288ae77b9470404754daa0c38391502b34434ac0628dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD54F 16264 bytes
font_02_sfnt_off0000ff9b.bin
be74cb32bae9ab37778c665db4b00b8f881460feac1ed74d7e88e3cd85694b26		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9B 10328 bytes

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