Malicious PDF — malware analysis report

Static analysis result for SHA-256 076352180a68f502…

MALICIOUS

PDF

74.7 KB Created: 2021-07-03 14:08:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bca026200030f4eca6881336754def82 SHA-1: 61720e1f84ea6e1cab3cbe2d245eb6acd8496eb5 SHA-256: 076352180a68f50226a7b9f43095f0649a6bbfa33c63ea1c98b62bdeba526451
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, directing users to compromised WordPress installations on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs point to potentially malicious content, and the document's structure suggests it's designed to lure users into clicking these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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
  • 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 http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075989aaab4b---20521433986.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/1cfb32f250b5c0cfee4446ec72536be2/91807634926.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/6cd1bcf95aa68ea269392ea4d4ff662e/xetokudi.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c01384b5f2c---bepubulajafusutaronisali.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/4b0d21d0377eccc909c0c34965336dd3/98791530432.pdf
    • https://csn-alliance.com/data/files/wuzigodakavabimawuxewon.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de15cf431fd---tufabojomiva.pdf
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/77fe2c759451f128f47ec60604dc9d04/dakazuborafobawas.pdf
    • https://plasy.com/uploads/file/54951905127.pdf
    • https://abicecream.ru/ckfinder/userfiles/files/tolevutemunob.pdf
    • http://copingconversations.com/userfiles/file/zolefibosenum.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7b1954b12---6284474172.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160768708c031d---37506587851.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/c14f98f3be4589d0003cd2e3b5d1f460/zosazipa.pdf
    • http://qhs1978.com/clients/d/dd/dd8db5a278a7ad55a2ada34b8e38ebcc/File/33684742188.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/39d6fa7eec38fd29e765743b8ac27863/72039834345.pdf
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/r0v60q2h36bcc78ogti3iirg53/9777835056.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160714dbd3df96---25731007585.pdf
    • https://airflow-skateboards.com/upload/file/lijuvununekev.pdf
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/0b7922e7a5c44ec109a702f44f95020a/62512378200.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/krq7ivkuh8jl2fpfh0lpuuqob4/64179783996.pdf
    • http://ellev.fr/upload/files/85784323580.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=how+much+water+is+in+water+bottle
    • 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_off0000bf1b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF1B 16792 bytes
font_01_sfnt_off0000d732.bin
33c4fac22ec14c30cdc25b49a26584f89adec7f7c02d913816f2068009485fc9
pdf-font-stream PDF embedded font (sfnt) at offset 0xD732 10812 bytes
font_02_sfnt_off0000eff8.bin
13273a59f59a98eca53b48a177f192033e5acb7b105ed68b693c88eb78ee4efa
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF8 17508 bytes