Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd7cf2f4488d46dc…

MALICIOUS

PDF

92.0 KB Created: 2021-06-26 03:06:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 477cd2436c44c4e920564ec98ecc4ed9 SHA-1: 4f9f19c51ebfbc2756d1e1d4a07229a0d5f97681 SHA-256: bd7cf2f4488d46dcdbcde4ebbceaa226ee01f47d154ae48a720ddb04a66542b0
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and a raw IP address, suggesting it functions as a link farm to distribute phishing content or malware. The presence of embedded URLs and the structure of the PDF point towards techniques used for initial access via malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/59745ebd89e708d641eabac59e9f0483/28577965515.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/05ac4f2817aeb7a1ef70cbe868480e9e/wobejibirekofuboge.pdf
    • http://ksnjl.com/userfiles/files/13471267930.pdf
    • http://leebyunghun.kr/new/upload/board/files/lisobo.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac76bb619e---xikunotomowe.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609718fee0fea---16198173773.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/1bf15c30c94bcd28f6e70f4270df3784/kamakuri.pdf
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/8d44182f190d7281727e34177205ce82/32858446256.pdf
    • http://hani-bee.com/userfiles/files/wadetetiruzi.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/fe362568c27130299c35f776f68b6d8c/88931807329.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/dc3ab4c63e8de3ed258c56497d5223d6/50329857577.pdf
    • http://anhuishangbiao.com/upload_fck/file/2021-6-3/20210603055850938186.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1609be20beeb67---63135553392.pdf
    • http://coopmong.com/ckupload/files/giziwezomifavenun.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160a18a81dd35c---nobagato.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606f0aca242d8---jalodukagulatud.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf8d5e41be---48934831291.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb9aa5285d---6563430763.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/23626e81f83547793febec9c0fcd7e75/99187012988.pdf
    • http://asokmontridental.com/userfiles/file/75036220891.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67f05a56e1---xulojiponar.pdf
    • http://dfh-consulting.com/userfiles/file/98740137282.pdf
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/fba12859be7631565526347db0c2fc7a/kuzotixenurirek.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=higher+and+higher+ghostbusters
    • 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_off0000ffbd.bin
dd01bce2dd5f9ddadd9fc2419a0aac048d85985d4b7e516bfaab0869b4253131
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBD 10712 bytes
font_01_sfnt_off00011804.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11804 16792 bytes
font_02_sfnt_off00013016.bin
ef2f2f9ecff60622c896e9a875609030c0374dbaed664f63b2b6e8e4b38622b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x13016 19212 bytes