Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc2f722a02eae8e3…

MALICIOUS

PDF

87.0 KB Created: 2021-09-04 20:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3341ffb45cdd35abc99f4506229ee88e SHA-1: a49f014ff9fe4be3f7ef1d1b8086483d103d77fb SHA-256: bc2f722a02eae8e37c1477e481cd70c10f74e2572a59a63531ff7c238ef009e1
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. The presence of these links suggests the document is designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://archism.ru/uplcv?utm_term=science+worksheets+for+class+1+icse PDF link annotation
    • http://industrialdevices.in/uploads/99791982322.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/tibasofolojurazekidilu.pdfIn PDF document text
    • http://www.vikingmaterials.com/img/zawurinixotajutujud.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/1e9534e58be390a2ddf93433f101555d/lavit.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/ba4e4dc3a85b0ea8efa367bcbd824121/18098895048.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/ce19b7f3fe1019260f7a846fd18c769b/votetigunivevarupetigi.pdfIn PDF document text
    • http://aweibel.com/Photo/file/vafadetezoga.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/4b48bd4d228bd571016b2ad196d38078/62211606752.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/mivajevekakawol.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/f8af74d90a28106f5b2dfde6dcf7a253/42075463366.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/rh986oi23il7hna204l6lhsm00/lemamubuwisagilesewuj.pdfIn PDF document text
    • https://polandpools.com/contents//files/21495689836.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/93095354945.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/a0935a967a24b0fd2e2612c0cd6e870e/faruralopajoxiwegufewob.pdfIn PDF document text
    • https://krippner-schroth.de/wp-content/plugins/formcraft/file-upload/server/content/files/160753fb4ca619---kigipuperisumi.pdfIn PDF document text
    • http://ithalattagarantibelgesi.com/resimlerfiles/gagozasudironizujo.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/9a703279cf5f171609a2cb4a2e9c3250/mejagimimawoxaxapuk.pdfIn PDF document text
    • http://physio-praxismitte.de/userfiles/96750034503.pdfIn PDF document text
    • http://epicridesnepal.com/files/gibiwubiparowimidinup.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/gaxurame.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/e68557663de9998abf4494ed7debe4fb/86907423783.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/5f991a93999061d59a6b8f820dcfcf5a/revatizibapuvufavakamu.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/3a418548c3e2315636a3c2ce6dec4334/rawulat.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000eefd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEEFD 17820 bytes
SHA-256: 40202f5d8f7a3a1a8cf8b4960b96724c6195ec00573484eb805de5719832b6cb
font_00_sfnt_off0000d6ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6D 10740 bytes
SHA-256: 6b7891688749f483ade0217b74534e8a7b22a48f1a1b4dc3b972bd0178007f41
font_03_sfnt_off00012323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12323 16484 bytes
SHA-256: b9deb41d1539e47a4a3ca1096f1cf23d175291c42a80af63bf7a320060378356

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