Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc5c345fe783d6b2…

MALICIOUS

PDF

86.9 KB Created: 2021-09-12 07:13:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2bc4ca6dc69a667dbb9ff6108d3c8489 SHA-1: a26ccc2cb2904239e903395f62ed659b6ddcee54 SHA-256: cc5c345fe783d6b2678d664ee733170d9054030a8b150664098d89da13cd5a8e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting, likely to redirect users to malicious content or phishing pages. The presence of embedded URLs and the nature of the links suggest an attempt to exploit SEO or lure users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://inwebjor.ru/uplcv?utm_term=emulator+to+play+pc+games+on+android
    • http://yule-sign.com/upload/editor/file/20210905145258.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/d93f61c441a8adb3ad3a5ca9bf67ad38/jodagepokotetel.pdf
    • http://cortocircuito.trialpanel.com/images/Upload/files/12702637735.pdf
    • http://www.tlo.ntou.edu.tw/ckfinder/userfiles/files/24734522841.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ad6a815a7cf52ce179378108aa82e34e/kugitojarekirena.pdf
    • https://atlaskvartir.ua/data/uploads/files/64908909653.pdf
    • http://dui-antidote.com/images/userfiles/file/pupiwuvit.pdf
    • http://bodybybodyology.com/ckfinder/userfiles/files/48729661400.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1613d6f7ab49fd---saximazixezexalevapef.pdf
    • http://hanhthien.net/uploads/file/72197641297.pdf
    • http://aorganboys.handyfriendship.com/upload/files/15512201027.pdf
    • https://jin-ji.com/upload/files/zomibasupob.pdf
    • http://sbriz.ru/userfiles/file/61590904384.pdf
    • https://padservhosting.com/userfiles/file/80887420210.pdf
    • http://panel2conso.com/userfiles/file/susikil.pdf
    • http://c-amc.com/upload/files/legivazetesidetavuwele.pdf
    • http://www.dkmodels.net/ckfinder/userfiles/files/87271722363.pdf
    • https://champion-osk.pl/userfiles/file/88271572141.pdf
    • http://di-tech.kr/fckeditor/userfiles/file/34611288572.pdf
    • http://joesservicecenternj.com/userfiles/files/fakafizan.pdf
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/jubumokelarabumuwenebuva.pdf
    • 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_off0000ee8f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8F 16792 bytes
font_01_sfnt_off000106a6.bin
82f8d3ba23fcf2a1d6a632eea5830d0a51403fb504d2c35b830e65b9d5fa64eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106A6 11052 bytes
font_02_sfnt_off0001202d.bin
4d1fb13c629e4ea77113da42c3a8bae5fbb8c5be224c014391162b3f4f5b6eb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1202D 17916 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.