Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc325a9e97f972bb…

MALICIOUS

PDF

82.2 KB Created: 2021-07-13 15:33:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d5cc46bacba7ac64a272e98042db5d31 SHA-1: f9c4466dd429bd3acca886a388894d9528acbc4f SHA-256: dc325a9e97f972bb91554208be3f5cdf9e5ebc2852e2143099c69bcf7533ab84
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure strongly suggest it's part of a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://garglob.ru/uplcv?utm_term=ask4movie+after+we+collided PDF link annotation
    • https://imagebeaute.fr/userfiles/file/46017576056.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/17371296827.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/1ad4962afe70c0f0b5edcd2e6a51d24d/73722316940.pdfIn PDF document text
    • http://bixenony.com/userfiles/files/zazagajexonebisexofage.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/uq28t1n678bhmtilkvq262e90c/sudefosamuri.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/ve2jsqpt6n7h4fbr93ghpga310/98381729751.pdfIn PDF document text
    • https://marbellamohali.com/wp-content/plugins/super-forms/uploads/php/files/a955415278646221ec166cfb4a9ea968/nagopavenuxupalal.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed4f1ca8f3---2056724295.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/mfpc2t7aeil6uie5undn096kkq/wurumezugeduxaxe.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608494cc8df9a---gapitifal.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/fcfc09bdd33aa98ef8af1082432eead0/13069543361.pdfIn PDF document text
    • http://gdgom.com/upload/file/21062320571844781201hdrz0zggdp.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/3e78c5866027960464ac85e6ccde2c66.pdfIn PDF document text
    • https://cihangirhotel.com/upload/ckfinder/files/78678676129.pdfIn PDF document text
    • https://thehero88vip.com/ckfinder/images_store/files/nebazivugasilaz.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7bcc5895f---60244311893.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/akrtd7ilbm0pfitfs3o3mg5at0/luwinitumodu.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/c1ab7f2b2ebe8203f0227ec27a6bb94d/jofemufukeganiropumimepid.pdfIn PDF document text
    • http://hosteleriayvending.com//ckfinder/userfiles/files/25834951421.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c0109176756---zifaxumudax.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/pajixerelevixuwijorujo.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/86635666810.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/6odpume0ocj7g6elkbtt0h1aaa/4753834249.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/24026320350.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAE 17020 bytes
SHA-256: ab2e1d02d0b5977a3f3e639e56b4321be788ed98045274bf1fbb09dc495d86e8
font_01_sfnt_off000108a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A0 10836 bytes
SHA-256: d808594f85071f0c759b23dfa643cbfacf04a4e89fa504c46640cbdf580a745d
font_02_sfnt_off000121d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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