Malicious PDF — malware analysis report

Static analysis result for SHA-256 298ea9bed3d336c4…

MALICIOUS

PDF

84.7 KB Created: 2021-08-18 05:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: abaca82d3016c46bd9a597df8b9ef00e SHA-1: 895e8e229ad95a1a2f477c64fd91f2e11726ce1b SHA-256: 298ea9bed3d336c4aa2fd91d49d1f6ea72ffc997f6e83c31ad7db3e63fab3a7c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. It contains a large number of links, many pointing to compromised websites or disposable hosting, suggesting it's designed to lead users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.donboscovizag.org/images/files/mobijodasawefimoxuf.pdf
    • http://kayapaliinsaat.net/file/sizoramonifo.pdf
    • http://gsxr.hu/userfiles/file/39342953544.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dafa163fa69---27940145816.pdf
    • https://rajakedua.com/contents//files/65953125196.pdf
    • http://nicolalazzarotto.com/userfiles/files/xekeximewex.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160880757c873c---miwawoxefik.pdf
    • http://macautemple.com/userfiles/file/24647033239.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf897535ad6---mugikijononiruje.pdf
    • http://sushikyototogo.com/uploads/files/gonomoposubi.pdf
    • http://uctodane.cz/UserFiles/File/43825772675.pdf
    • http://otczenacts.com/media/files/zosufudarimivojuwa.pdf
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/2g3cb7i5rb3bcnu1eqssv8prsk/tefarexumipezarorefava.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/8575e7db98024a48d724f2e584668517/fowasafugebapep.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16073d41d91a68---pevavidapogubuwupej.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6bf6709fa---19447901490.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f14b181e020---79470218445.pdf
    • http://remont-elektro.eu/archiv/file/84079144296.pdf
    • http://kadh.kr/bobod/upload/file/79541334822.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074645ed2be7---pumazuziwotuseza.pdf
    • http://ehomeforeclosure.org/images/file/sosatixejatotonatuxuz.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/a8ec52e646228a7a667b2eb933ba81b1/49816596653.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b924b969c---63762441533.pdf
    • http://bigband-ulm.de/userfiles/files/bipidunaberivanepajaziz.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=what+does+red+light+on+dishwasher+mean
    • 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_off0000e51c.bin
0d87e89dfd8ad04cf789375813a13102cc2db83f855993d146e9f08f82252dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE51C 17112 bytes
font_01_sfnt_off000111f4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x111F4 16792 bytes
font_02_sfnt_off00012a0b.bin
3a5db89c7dc0cb57dfa8a706e6be0f150211afc2903086b9ffa8920dfe5f2a97
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0B 10772 bytes