Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae1394f2eabcad3…

MALICIOUS

PDF

85.6 KB Created: 2021-06-29 12:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 042d64a1b68e41de8541fb30646fbf64 SHA-1: e57d11375e849afec86092b17f662647c490f80b SHA-256: 2ae1394f2eabcad337a0b1e4df312dc9463ee03515943e768f1c190e6f45afea
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable IP addresses, forming a link farm. These links likely lead to further malicious content, as indicated by the ClamAV detection and ML classifier. The presence of external URIs and the overall structure suggest a phishing or malware distribution attempt, potentially using embedded JavaScript to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://157.230.241.115/image/upload/File/29865119316.pdf
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f71860534---tolevedexejewijuruvitogi.pdf
    • http://curry-box-deluxe.de/userfiles/file/61102879699.pdf
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/c46a83342d93d98aad833a823b468887/wirugadelokuzuzuxusaxivor.pdf
    • http://namuvaldymas.lt/userfiles/file/73525820010.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/7hce1v86643b6kurc3uvp8easg/binuvajaxubadowusobutovok.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/c4d2a4f78ac89e11f9033a80ffd3682a/bakafaxesapogo.pdf
    • https://fenixfalt.com/userfiles/file/vegimusatitufajuweguxa.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090abf5c3513---33887759723.pdf
    • https://aravlicraft.com/cmsCart//upload/file/lisafiril.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d24c83c7cc---55099038503.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ad5da6e43---revegubelaxulukor.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160af02155eee3---12822789104.pdf
    • https://brothers-music.com/ckfinder/userfiles/files/fisuzojum.pdf
    • https://kede.org/userfiles/file/sotijawonadixuzolarojav.pdf
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/sovoliw.pdf
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/ef22aa3068138370a239c02b7a5baa92/75874440286.pdf
    • https://akemi.ro/hirek/file/dikava.pdf
    • http://alimentosldm.com/userfiles/file/litigukijidedog.pdf
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/8a803234dba603a4efd85672d9b6b205/80405223784.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac3765c149---15101327224.pdf
    • http://incucinaconalberta.com/userfiles/files/jezimenudubuxowigosa.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=example+of+character+reference+letter+for+job
    • 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_off0000ed16.bin
f148478b0933fc3fdc1eb608e04751cc008cb37f6a314c7aeb37e2d8ae788d39
pdf-font-stream PDF embedded font (sfnt) at offset 0xED16 16816 bytes
font_01_sfnt_off0001187f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1187F 16792 bytes
font_02_sfnt_off00013096.bin
e77377c570a238c90b511cc2f24d16ed72bdea63b6d431055d16b6adda6a90db
pdf-font-stream PDF embedded font (sfnt) at offset 0x13096 10840 bytes