Malicious PDF — malware analysis report

Static analysis result for SHA-256 30933d903e80fcbf…

MALICIOUS

PDF

90.5 KB Created: 2021-06-12 01:57:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb900032c76e41bf029a3009aed699f9 SHA-1: 3e74895271b70a0c6ce7eb50700227d748dd399c SHA-256: 30933d903e80fcbfb5cdd0de5fb58a1e255bc7a77aeca60ebcd7260b240ff694
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of external URI heuristics and link farm indicators further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://garglob.ru/uplcv?utm_term=fortnite+boy+soccer+skin
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/r5h01dilhg7brfq95cg9644ptv/gomumalulofejerokibaga.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ac72b88a9---buzusamimuxo.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/71pq7qmr6g3f9v6jf24i85q816/sidifosenusunewiredow.pdf
    • http://stylekd.ru/files/mosomorimotowaremudonosik.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/36t4gvc4u2miqpvlgn4abs08p5/43745008146.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/a21ecbe72dd5ecbc1cc19f55413a8feb/fonibovaf.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/f04i3nshdfhbpvs4ij1pqiipb1/81936008865.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/50bfb7013a6615605e1684534cca61e6/23200256352.pdf
    • https://fenixfalt.com/userfiles/file/16501879171.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087898f595c9---zetibamovavotirexibaso.pdf
    • http://www.aqsclimited.com/EditorImages/file/45442184188.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a418e98a1a2---fadom.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/v9au5l6lhdit0uq88nv8ipemva/64475944082.pdf
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/d2d3868e31e979a4b2f7bb2bb45d37fb/kobesobujefuvarumiwasudup.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb987054b7---xonezukidadubujixofo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7bc.bin
590618357790b443c9790ab5c8b031439aa06a761f2fffcc9c6ba0116c0205df
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BC 4600 bytes
font_01_sfnt_off00010767.bin
8b88185fb1caa19b127db774f1e773b8ec41d1394bc7b72cd727186061f48d9d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10767 2248 bytes
font_02_sfnt_off000111ba.bin
32a657b14b91b87f38bd64223eaca3edacb868d317db0813a5e741d1b3d63052
pdf-font-stream PDF embedded font (sfnt) at offset 0x111BA 11244 bytes
font_03_sfnt_off000137a9.bin
8c1e3298cb301b6aa2c2aeff0a89e1cafee6626e56d5ffa98ad52a7598c40df9
pdf-font-stream PDF embedded font (sfnt) at offset 0x137A9 16168 bytes
font_04_sfnt_off00014cae.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x14CAE 4324 bytes