Malicious PDF — malware analysis report

Static analysis result for SHA-256 a64a11e014f178f0…

MALICIOUS

PDF

92.7 KB Created: 2021-06-29 06:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 09d6bd2182abd0f09d7ce39ba73f8887 SHA-1: fb42a7e1bd690a04ab463eb4098a999680a4e381 SHA-256: a64a11e014f178f0b7d1649c235ae4a56c07cb7bf34f947d5c0baee735bebb65
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://amphorabeautyclub.com/campannas/file/69604438356.pdf
    • http://bociany.sk/media/file/ramorejefemetus.pdf
    • http://yjsyrj.com/userfiles/file/23566917393.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/77ec2e486626557a27b156644b22a5a4/35757272259.pdf
    • https://houstoncoinshow.org/FCKeditor/file/wozatepelama.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16099ff45ca2cd---85273829135.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16074fa5035d63---62175427656.pdf
    • https://alianzatours.com/imagenes/file/voxaz.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/4ac49be07e0588d41712b5b094b916c4/6330055168.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077261de46cc---wajet.pdf
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609439624fc30---dibarevovaz.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/nj4og1ee2ik2mmr5eaikevfh81/54287508111.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c6614a0524c---16661754826.pdf
    • http://diysmart.net/userfiles/file/pajegiramepegijulureme.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840df222a42---78925730204.pdf
    • http://highendschmiede.de/highendfiles/file/pevisavimilejavugitu.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b0c3ab920---popinesuzufubimid.pdf
    • https://syntellect.ru/Repository/file/jiwuruzukagilijiwovuru.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c5db2a47ff1---kikezofopezudemadujujo.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1608aeb3b3c769---daxutawadutawepokadulimud.pdf
    • http://sochi-polyana.com/ckfinder/userfiles/files/tefumusixaweferafira.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608074ab9dd30---5914062644.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/f98fdab4f0aee248b6cc69bc65e1622a/64931494427.pdf
    • http://toonesk.com/upload/51575226605.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=how+do+you+make+yellow+dye+in+minecraft
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eca4.bin
726f11c50ddc416b99be470c21d384612dc5676e3e89375d5ec206aade34b681
pdf-font-stream PDF embedded font (sfnt) at offset 0xECA4 18116 bytes
font_01_sfnt_off00011c17.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C17 16792 bytes
font_02_sfnt_off00013428.bin
5cd8a120e106fc2d4fc1855603a636a3ce922decfb1b4d98f17a4a5450337c58
pdf-font-stream PDF embedded font (sfnt) at offset 0x13428 16344 bytes
font_03_sfnt_off00014a22.bin
85d9f819d04e8527a05b922be07ff5b139a47a9050b15181c695c573db64997b
pdf-font-stream PDF embedded font (sfnt) at offset 0x14A22 10852 bytes