Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7912b3ad9ec7f85…

MALICIOUS

PDF

107.3 KB Created: 2021-06-28 07:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 41e745ed4aad49971b8eb2335db54451 SHA-1: d5d80a79d545ff78815c15a40e7d5f091dbf8f80 SHA-256: e7912b3ad9ec7f8585615e33aed05f91edb1724961a3385303db0ab7444759f2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external URLs, many hosted on compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URLs likely serve as a lure to download a second-stage payload, aligning with the typical behavior of a phishing document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9780

Heuristics 7

  • 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.
  • 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.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/4il4pm7hft62e45nae8e72n216/poxomidesokozoboroma.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/54a0hm7fvk3cfbbm95ebg02m34/36196844305.pdf
    • http://copy2d.com/ftp/image/file/lekezerajaxer.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/6bufc5avmfgokv8jrlonr9qhqp/74802242538.pdf
    • http://afghansolar.com/userfiles/file/xipotawad.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/929499149f53b6f372099047732f0d75/tubufusegegoxowita.pdf
    • https://amd-export.com/site/upload/file/76079556600.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e945ad0114904e4f67d4b5f6027a76c0/jibagezedaz.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16097388fe841d---53117917307.pdf
    • http://fontanarosaserigrafia.it/userfiles/file/xenoberukavijikit.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/a22f3b2dc4137cd92c0e88330ea31307/kekarowerizawaturago.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/mbesdl41v1ammeiea3h6q554d3/tilonarenefomiv.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608b55dfe9224---12848931728.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/c21k5vo3gi82e4e78k3crav6t3/soxilotisanelowuwor.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/2phfk3mgfjf4cdsu0s21nnrn8d/dusotakibomagamawodige.pdf
    • http://jjinline.org/file_upload/file/86366053953.pdf
    • http://mwflower.com/upimagesfile///21673790047.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e180418a9---2652003161.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/47ca31e063ef5395f2c1110fb8e4c77f/80448799875.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ced46d7011---54823617821.pdf
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/2r1lp3djv8blb1uo2hpsklcfuq/15304902415.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/ae4a4f2b73d4fa6a4d28a8aeef7f6a0e/fefowerejiwebokorid.pdf
    • http://digifast.cz/userfiles/56044715400.pdf
    • http://aire-limpio.com/img/editor/file/mikilev.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9922d35f8---87704124873.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16082de86424b6---35406030915.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/c2dc618ca8a3c3aeab378dc1189000a5/pazapizu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=knife+attack+techniques
    • 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_off00013fc8.bin
5de1b3ffb882aeb516ccecdaba1250a9567be2521138f75053afe81b3dac41bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC8 10496 bytes
font_01_sfnt_off000157a2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x157A2 16792 bytes
font_02_sfnt_off00016fb4.bin
91cc92addd017f4677d82b13bbf143e8fed0e88d818b4ea28ad49a90cfe0b8f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16FB4 17812 bytes

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