Malicious PDF — malware analysis report

Static analysis result for SHA-256 345b9c0e24dc0bf1…

MALICIOUS

PDF

95.2 KB Created: 2021-08-20 07:22:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7729699041c7bc8fcde6189a65b64eb9 SHA-1: f862229b6092646d3a4803bee7afb24ee62952e2 SHA-256: 345b9c0e24dc0bf154b8d093ea4666c18d4b5bcfcef6f5f195dcd2e24a7c7b7b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting it functions as a link farm to distribute malicious content. The presence of these links and the overall structure strongly indicate an attempt to lure users to external, untrusted sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://archism.ru/uplcv?utm_term=bestiary+2+pathfinder+2e+pdf PDF link annotation
    • http://livestocktool.com/d/files/41370732246.pdfIn PDF document text
    • https://tisuputih.com/contents//files/rojivirabudisoxoz.pdfIn PDF document text
    • https://zevkotodoseme.com/upload/ckfinder/files/puxes.pdfIn PDF document text
    • https://signika.pl/Upload/file/93845432056.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/3e8593ec15e13a29091196473e8cf082/11736513616.pdfIn PDF document text
    • http://toeicspeaking.net/_UploadFile/Images/file/voruwazosesazumibizagug.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610906be25c86---tuwusipafewiv.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/tlhic5o5vmc6et1dl9njut3php/rolifisemuxe.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a486401c35e---32310793598.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/84134635210.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/e090c72de2b51df1ebfc320a851149ee/wolavuxipimi.pdfIn PDF document text
    • https://seerupit.dk/assens/file/feganexegejazefa.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b296236c1fb---kujotepez.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/otb67vhntalqf71ecn5a58s1to/nozupe.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/webaboboxenevokid.pdfIn PDF document text
    • http://shreejians.com/userfiles/file/napulurubetojubu.pdfIn PDF document text
    • http://hotelpenza58.ru/ckfinder/userfiles/files/zipufivirifokinawi.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ecaaf01f1---kesuwasovedagafivurasol.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/69090302407.pdfIn PDF document text
    • http://fluellentrees.com/clients/58222/File/gakim.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/tr4bg9iei7tu08ik6p5kl3v1u3/xebinaketo.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a76e8292a64---mubaxedewerekeberojojug.pdfIn PDF document text
    • http://futuralagoparking.eu/userfiles/files/badigugozadamule.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/b7fe9af6e6eaf9477cbc9b2a7870aa4a/66596494552.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11190 18088 bytes
SHA-256: b8ca3bf8610189de29b2eec01c1f799c27fe18a6872a10903c1a7cc30e19edba
font_02_sfnt_off000140b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140B1 16192 bytes
SHA-256: 97e3f73a58ccdd4784c9ae1678d9f90717e6b6d0c87c36bf93adb8865ef65ebd
font_03_sfnt_off0001563e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1563E 10716 bytes
SHA-256: d1363e61f7026feeaca435931ad2569fa459cba1b8255e11b03ea36dad7ed9f7

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