Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe56fc1f7f09041f…

MALICIOUS

PDF

87.0 KB Created: 2021-07-26 22:59:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0ad337e2198ac49aab6ac470bef62ad4 SHA-1: 798b30c09b72d3030281440911c29e834f5feb31 SHA-256: fe56fc1f7f09041f105ac0657fe4fa89cd10f0b9e4057e1381f1d0494fe62eec
136 Risk Score

Malware Insights

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

The PDF document contains numerous links to external sites, many of which are hosted on compromised WordPress installations. The heuristic 'SE_REMOTE_SUPPORT_LURE' indicates the document's content is designed to trick users into installing remote support tools. While no scripts were directly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to facilitate unauthorized access or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f362bfda12f---sajavow.pdf
    • http://www.asap-recruitment.net/upload/file/4963368402.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609422d8b60ca---divesufezeredazejuwapupot.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/e3c6b6d84f624fbddd4ffa73ae477b8c/88296924717.pdf
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/7a9dee70d8549f9e7910c6a9eff5b372/85858314103.pdf
    • https://mosconi.net/userfiles/file/52562821475.pdf
    • https://ceral.pl/ceral/pliki/file/ponevufipejamupiza.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1608255f0155aa---dewolutusuwiwowizabove.pdf
    • http://jan-fotografie.nl/upload/files/bixagamovijezatamefoguvej.pdf
    • https://cdmsig1.com/ckfinder/userfiles/files/88300532116.pdf
    • http://jagodkaprzedszkole.pl/userfiles/file/vobesawi.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d10f8196d---29945029542.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16090dd14ed9f3---gisawozifal.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160ac356edd417---78578450410.pdf
    • http://amandamaitland.com/images/file/12019409454.pdf
    • http://bigdoughpizza.com/uploads/files/vawepavijanodivuwife.pdf
    • https://condominiovillage.com/userfiles/file/bukexeritiwis.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/4c6f13807a575d77367221f0dabb1f7a/dululapinuwosamovoro.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787256af8d2---40080675920.pdf
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/a10acf73ded6887c4a86826502ebaa41/78592015833.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/e1a7d1f2b0f52592daa54419e8f8886f/35527188334.pdf
    • http://busankid.com/webfiles/board/file///wakorutesetiwavosagupid.pdf
    • http://travelport.pl/userfiles//file/95644367341.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=teamviewer+13+free+download+for+windows+10+64+bit+filehippo
    • 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_off0000ee60.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE60 16792 bytes
font_01_sfnt_off00010672.bin
e8f9a0f74acd884b6fff1f7b650641fdc782688537561da96f105c2bfeb64cf6
pdf-font-stream PDF embedded font (sfnt) at offset 0x10672 16996 bytes
font_02_sfnt_off00013275.bin
64679a49efc51e1e5cf82352cba09c9b4e45708bbbbaa1c1254f8c4a6ef1ab3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x13275 11608 bytes