Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba1a0c69212db76…

MALICIOUS

PDF

86.9 KB Created: 2021-06-29 21:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dd4a321abf84a8bfd479dad40d351581 SHA-1: 487af9b8637eab8542cbfe4426d6dadde475aa54 SHA-256: 9ba1a0c69212db76de4bdb30872c07966010cce661a7d66cf43a6b023c502b78
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, presenting numerous URLs that lead to external resources, some of which are hosted on compromised CMS upload directories. The primary goal appears to be directing users to potentially malicious content or further phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://angkorphotographyguide.com/userfiles/file/mokijev.pdf
    • http://bobiniauto.com/userfiles/file/14127183918.pdf
    • http://adamlegal.com/userfiles/file/rewunoxigifemedatamifo.pdf
    • http://www.sphotobooth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771d443e24d---55374903235.pdf
    • https://decoveinvestment.com/userfiles/file/sigiravuvetoguluvobupum.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/ndgg8109cb8t8nifq92lhtr20g/xadeforutorekutute.pdf
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/r73gak9pumsafnalmelsi2ebc4/popamozuxodisuj.pdf
    • http://ty-universe.com/image/files/20210621_062657.pdf
    • http://auapp.ch/userfiles/files/83430153105.pdf
    • http://pelesiuvalymas.lt/i/File/mimodikunosamunufodivize.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/a7aef24937f627fbfffd6b63d5ced971/kojudirixiviwi.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d17e4b4236---55795924551.pdf
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/651b3185ec8fd72c7750bc3183fbd538/91638850106.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc28eae6c5---pipewa.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0fc5c3fd7d060c4935994d8f6eac2dbc/909100855.pdf
    • http://yogo110.com/userfiles/file/zirinudosimaziguzerobelus.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080e8d49c36f---tizulufepibule.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b04f9a3d9db---91382222874.pdf
    • http://alphabodysupplements.com/newerac2c/userfiles/file/narojunenimamix.pdf
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/22606343859.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+do+i+set+up+a+second+monitor+on+my+laptop
    • 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_off0000f02e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF02E 16792 bytes
font_01_sfnt_off00010845.bin
b7d2734c699027cf9338deb41736d18c31f5b88a46216120a337c7dbbaf14bd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10845 10964 bytes
font_02_sfnt_off000121bd.bin
e63d352a6fb697cc986e168d59f66573a325074823e512a514cbecec3b440fc2
pdf-font-stream PDF embedded font (sfnt) at offset 0x121BD 17060 bytes