Malicious PDF — malware analysis report

Static analysis result for SHA-256 180a1195e902f541…

MALICIOUS

PDF

83.2 KB Created: 2021-09-01 07:07:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 71bc33b34a51f4e42ce434c64994d2a0 SHA-1: 3484d6e61312baf81a413d690009b63cac1aabe3 SHA-256: 180a1195e902f5415c52be72d67b21a0ef2ebda6dc04b50ea152078474644425
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to potentially compromised websites, including those using CMS uploads. The primary purpose appears to be directing users to external, untrusted resources, likely for malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://amandamaitland.com/images/file/96920111029.pdf In PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073736087701---67013644415.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/0dad8cb0015c416d491651ed8bec06ad/66790724125.pdfIn PDF document text
    • http://umhouses.com/uploads/files/5111113447.pdfIn PDF document text
    • https://hiroyoung.com/data/files/mikekimomepovolokesesex.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096a47597836---37992010739.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1608032b1a2c6d---sijosufifimu.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20210615_2B65D203CBAC880D.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/laborul.pdfIn PDF document text
    • https://masihpt1.com/contents//files/samosaxuwudaguvuz.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/3571f0eb08db7739feb189d106debb24/komugapavosugosokalokoju.pdfIn PDF document text
    • http://www.toptehnik.si/images/tevajegivemutibitepal.pdfIn PDF document text
    • http://scbczy.cn/up_files/file/20210616_145121.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/1d05bb387db184f35f89031159cabd10/jolagas.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/569542f60b04ac676dcf005735c2c428/4552886418.pdfIn PDF document text
    • https://gilbertems.com/videos/file/74551540254.pdfIn PDF document text
    • http://chithanhplastics.com/uploads/userfiles/file/gexibipuparaxomaw.pdfIn PDF document text
    • http://szerecsengyogyszertar.hu/editor_up/nakolefiwimobotus.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160edf59ddf0b5---25800910107.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/35187299610.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/km2to18d62or3nn372740d42v5/rimukol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=anxiety+shortness+of+breath+for+weeksPDF link annotation
    • https://tes-sys.com/uploads/ckfinder/files/20210713/16261258968047.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE217 10780 bytes
SHA-256: 458a7a1560eb00821eba9e2480b649d13b696157d4db071d23e6e312cfa438b3
font_01_sfnt_off0000fb01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB01 17200 bytes
SHA-256: 0b4e4bd5a59458a68f708e2b7cb9f89d91b7bf1543c79c39018ea65392d98d19
font_02_sfnt_off0001271a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1271A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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