Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e5ee4d74d94e9b…

MALICIOUS

PDF

89.3 KB Created: 2021-07-03 02:43:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 53fe5d5e4b8e8f20231efeac484c6567 SHA-1: 7bb6994cea33292c98f015aae82897627944c3b4 SHA-256: 68e5ee4d74d94e9b1da993053799d4705c910ac3e0085bc4d876086cd06c6084
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://homespakistan.net/magzine/uploadfiles/file/jepebusi.pdf
    • http://aarogyamedico.com/userfiles/file/nosij.pdf
    • http://anatolianlgs.com/userfiles/file/45727841940.pdf
    • https://hizlipin.com/calisma2/files/uploads/63097941305.pdf
    • http://wilkinsconnection.com/clients/9/94/94ba1e7d864c5c8af3bb481f5f9f31de/File/46677633908.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2449d54d1d---badunebepoxupiwifavesib.pdf
    • https://agentcctv.com/userfiles/file/99789703928.pdf
    • http://theettiaresmontreal.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/28619014024.pdf
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/26014d2a16760047aba2f773954fd894/naburibabigoregeti.pdf
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608445a9a152c---rasirokutap.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bbcafabb44---digolelakisogejorozi.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b29f007958a---32538860205.pdf
    • http://j1medical.com/uploaded/file/88725728343.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/3d997476057998680ff079e3ea531e82/47594861430.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a4566da30d2---84826289817.pdf
    • http://anthonyellisonfamilyreunion.com/clients/f/ff/ff850d76676c1858bf5e443b7a907d3b/File/22304089019.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3345e6d5fd---98561630139.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/04ce01357b405d6a0406b5ee3480f6cc/kutelijijofenemesef.pdf
    • http://szguilong.com/userfiles/files/14497957243.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1884370908---valekutuguwizu.pdf
    • http://www.awakohchang.com/image/upload/File/ixugijabejofuxonenovab.pdf
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/k1bqo3n09oj2phl27kadfndap2/84142423394.pdf
    • http://pantryscan.com/123cars/imagefck/file/jafamos.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=chainedtransactionmanager+spring+boot+example
    • 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_off0000ea41.bin
92719105e3ca2e7eb65876a8d45af77be3afa9e903c261d950a6120c6c8c9622
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA41 23200 bytes
font_01_sfnt_off00012460.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12460 16792 bytes
font_02_sfnt_off00013c77.bin
c1a6287d0ea728000ee5024ed3a164e4aa5b358b3dee9f8c1d79abf10f141efd
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C77 11236 bytes