Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee40b0c6995d43ca…

MALICIOUS

PDF

87.1 KB Created: 2021-07-03 05:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ccda6fd4fba37b8a92508c892988b39d SHA-1: 93084a820207f5a1fc59f37cfaacb30f27b51d8d SHA-256: ee40b0c6995d43ca920a0246af17324be3f90d86a52a24a45c1d7ac184cc73ac
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a distribution mechanism for malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. The embedded URLs and link farms suggest the PDF acts as a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://drafthe.ru/uplcv?utm_term=pulse+rate+and+age
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16079bab35ef30---29924052865.pdf
    • http://alanurturizm.com/rsm/files/18607471227.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a76e96c982---xagiduser.pdf
    • https://www.avantagesapp.com/uploads/files/zasokixudolovet.pdf
    • http://alkanboya.com/files/file///sifapimufosevadalevovibov.pdf
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/13f1110918c90570e1150f6a4048ee54/nalurupegoru.pdf
    • http://fw-simple.com/uploads/files/zesari.pdf
    • http://jjinline.org/file_upload/file/ravapobagi.pdf
    • https://soechi.net/userfiles/file/56521835375.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16099ffef4520c---15182674386.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720ca519ada---wozagiperagidonazegazeduk.pdf
    • http://ceraunavoltapizzeria.it/userfiles/files/59437875327.pdf
    • http://ricarda-allegra.de/userfiles/file/29424214330.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5d91d1bad---16063024630.pdf
    • https://edmaker.site/wp-content/plugins/super-forms/uploads/php/files/29b7c76178230ed570479a4a3ddbaa77/83004069878.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b93e81b28---tipulesibojozetagirugud.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e787d1aa52---22091239634.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/e307cf72f1c1aeb1c131e2fc7204c548/vewokalukezoze.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/k5r38cshtea7ebbuqlmshj6n17/52666410801.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160764cb29e97d---53875527197.pdf
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/845d7ec84ef87c2147287bd29ad1e923/69686002534.pdf
    • https://cihangirhotel.com/upload/ckfinder/files/nokuzubuf.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/7j4vu22n97bj946e8jb3dnf036/69952110108.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc8abe361a---2163330844.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_off0000f4d7.bin
c96ac0cf62e4b3ee96c9a2370895a16e8439ebe26746913f23bc7f00956f587d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D7 10312 bytes
font_01_sfnt_off00010c0e.bin
0602edc0fcc30a96eb36e401b2d2be5f562ef3180bea3c2218018dd5b50fe9f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0E 16728 bytes
font_02_sfnt_off00013773.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13773 16792 bytes