Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa01baeffe484e1b…

MALICIOUS

PDF

81.9 KB Created: 2021-07-05 10:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 96d24ee6c0cb5cbd16d82fe375b07f84 SHA-1: 2dc62f8a6f0c9057ae34c5b43120402a45c62c63 SHA-256: aa01baeffe484e1b3476bd34a2a612eead64fdbe69ab4c3ea33b89d61fe6b948
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to numerous compromised websites, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://mosconi.net/userfiles/file/95051550467.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c5eadd71f8c---fuzozagukamov.pdf
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/eaaa637ebc5207c711d2b4507d2046a6/57675845277.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c98bfa46e46---11251303134.pdf
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/bfjcp29opum6gtbsk7ajamogj4/lakelujupori.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/7givvme3aa8nr747v4gfs8nvc6/85212276573.pdf
    • http://www.srijonihealinghome.com/fckimages/file/bulutunopoji.pdf
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/3834bfb446a2f526ba0a6e7744a5a650/fewonupafovidavatil.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec1acacdc6---dosolonitimaga.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e48b9b50c---zamizizarevupabal.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b164efa5c---denowuduwa.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed23d69321---tedogamef.pdf
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/40e5469c0f913c1b482ac8e575201a1a/1583572252.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b14f3edf617---potapukilufuzivepibal.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/49a99921953bbaad0326bcd0a3de3af2/29977870251.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160794f22c9ef7---9087922870.pdf
    • https://namratalakhotia.com/userfiles/files/zozep.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db4e21c3c11---meranubakatuxotipup.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/92df22b39d11536b7fb13325619501ac/mekox.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073f1d6598d6---dudiluxi.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160887e63eccfc---26521661867.pdf
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/3f41123b3a682e6913ef5566548ac560/79569913899.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/4af04e8140ce9f0aac1f12cc5ecae595/42473260623.pdf
    • http://bigxra.com/uploadfile/file/2021060315312973499.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=download+cheat+angry+birds+2
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/11739a1efd1fadc6155675bbe9888eab/68696429294.pdf
    • 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_off0000da73.bin
d84c6fbc17f16df3374864dd0a33777a7e376df154d5c5ffc38ae0bc8313e03c
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA73 18396 bytes
font_01_sfnt_off0001087a.bin
d907aa96b4e32c5fe1daf6415fc741cb3f1c67861f47e6f8a0505835c5e0e80f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1087A 11112 bytes
font_02_sfnt_off00012243.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12243 16792 bytes