Malicious PDF — malware analysis report

Static analysis result for SHA-256 f49549793093abb3…

MALICIOUS

PDF

86.8 KB Created: 2021-08-17 18:25:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cc8bb03aae61c55dec1d6b64078c0ecb SHA-1: 9e3fc5476eb5f6028ef65ff8966db3bbd726b406 SHA-256: f49549793093abb37a60d71b10380ba53b38457baa189c60231e7db79bb250fa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting. The primary purpose appears to be redirecting users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/b9703674c0601de47d61c5bc36a6cfec/14843422914.pdf
    • https://vientangluc.com/upload/files/bekuzobixepew.pdf
    • https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/gipidirogewawemerorisu.pdf
    • http://geredekombiservisi.com/userfiles/file/rosilunoniluxa.pdf
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/3e41d7c63386d633af319f98f64fcb92/40516137751.pdf
    • http://movietek.vn/hinh-anh/files/sewunejuwok.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608adcdf63738---60956249422.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/15cbea03f20b16516830859958762a84/11020255045.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb295d3d65---fapogimofe.pdf
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/da1e62cd2615eff94ad876af871d228b/60757183539.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/c5ue04c4v2581ohdsvqev02lfc/wiredemifomidufin.pdf
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/2op37ti0q86oic7d0tcnp5gup6/23427570216.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/lampghb7i8cfhdpqi5a2pv12ve/92835457933.pdf
    • https://obermeyer-modemarkt.de/upload/file/45081107427.pdf
    • http://antoniolescio.net/userfiles/files/32230294993.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608b663ad830f---misotepavukokujel.pdf
    • https://promaxsuspension.com/csmimage/file/13580141493.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/74b40ddb21f014f0ee6176cf47e8c457/9932393195.pdf
    • http://pc75.net/upfiles/file/1621187621.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/llo6km0gi4uvl70pdbj1lg69a4/42447884147.pdf
    • https://viboot.com/ckfinder/userfiles/files/mojepulagafafixupagube.pdf
    • http://wdnederland.nl/file/49501149305.pdf
    • http://mrspk.com/ckfinder/userfiles/files/dexos.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942935589c0---fexidumizunepe.pdf
    • http://suacuacuonthanhhoa.com/upload/files/nafopumufonemepo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=ejercicios+matematicos+para+ni%C3%B1os+de+segundo+grado+de+primaria
    • 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_off0000e89a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE89A 16792 bytes
font_01_sfnt_off000100ac.bin
7d8fdce3aa71238938ec6e4d9ee80040c65d611e14346011b38e99454b340ffa
pdf-font-stream PDF embedded font (sfnt) at offset 0x100AC 18476 bytes
font_02_sfnt_off00012fb3.bin
6d761a690c8ec8167ca6bc68c8575854cbc0aba384ac754a669687981b9433e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB3 11228 bytes