Malicious PDF — malware analysis report

Static analysis result for SHA-256 e60aa6fcacacf03e…

MALICIOUS

PDF

83.7 KB Created: 2021-09-03 20:46:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 01eb64cb23a13257da21af315c785076 SHA-1: 2853eb926f52245982169a43aa646c2e5c0fb6d1 SHA-256: e60aa6fcacacf03e1ca8a7abaaaa3c04d14532786ba869cf2740876f76b199c1
164 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to compromised WordPress upload storage, indicating an attempt to host malicious files. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of numerous links on potentially disposable hosting further supports a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0eb83f546---mepedus.pdf
    • http://parbatsamajjapan.com/img/files/files/rejalabuvejolovumaxali.pdf
    • https://zanhotel.ro/beficientconsultingFiles/file/lizuxafasisobuw.pdf
    • http://olivia-mitzvah-2020.com/clients/b/ba/ba4af741f15bd7b6832e7848668b55b8/File/38855150334.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759304875d4---68572483531.pdf
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/1tjc036cfj2jh4tpcjcddacaqe/53694459252.pdf
    • http://coalcreekcentenary.com/clients/5/52/52f735e63eff8706e1a2a73a20aef632/File/vinodosi.pdf
    • https://sinhadventure.com/uploads/file/10307743623.pdf
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084aa7fa5863---92586016783.pdf
    • http://adainst.com/uploade/files/20210623084535.pdf
    • https://fnb-concepts.com/images/uploads/files/dujerumudewarowozuvumivi.pdf
    • http://www.blueoak.fr/image/file/jizazapeti.pdf
    • http://botosani.ro/img/uploads/file/kugopavijokofub.pdf
    • http://westtech1963.com/clients/d/d4/d4250bc21dcbbf02d7f9bc68df143add/File/zemunekimifusutajaseragel.pdf
    • http://www.corazondelsol.es/ckfinder/userfiles/files/movuzosonukazurajilegosu.pdf
    • http://frutapac.es/ckfinder/userfiles/files/wufasodevevawuj.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e9f30f8f4---2586575511.pdf
    • https://mauspro.net/upload/files/52919286355.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160845e6e33885---xovorotofozowirijoxe.pdf
    • http://onnetsolution.in/userfiles/file/23195977822.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/b4aa17592e48d519a0752255fef92578/xujitomuxojavimuf.pdf
    • http://noahmission.org/dataroom/file/75246455736.pdf
    • http://prplus4u.com/ckupload/files/77611099774.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=schmidt+and+bender+pmii+5-25x56+manual
    • 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_off0000da9c.bin
74c438aa34711a84fd1710bc84c00d44956906f4e395b566db13d2bc02948e3b
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9C 19028 bytes
font_01_sfnt_off00010cad.bin
917b74b70c6112347baf9fedd6b3d9bc481df77960d34120feefa472f5aede3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAD 11364 bytes
font_02_sfnt_off00012728.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12728 16792 bytes