Malicious PDF — malware analysis report

Static analysis result for SHA-256 23313890947046d9…

MALICIOUS

PDF

95.4 KB Created: 2021-07-17 20:34:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e15bba17a41f98f3136d6ad84bb1bb4f SHA-1: d514d5ff4f4c75563f6d5f228f3bc16cf6f1e75e SHA-256: 23313890947046d96b89b8e2fae8612e9fcbafdc9cbc08f9b98a52f8f2910b7d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with many URLs pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the presence of numerous suspicious URLs indicates a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 http://namadagaskare.ru/ckfinder/userfiles/files/87269294482.pdf In PDF document text
    • http://rsst77.ru/upload/files/suxatixaz.pdfIn PDF document text
    • http://jacksonreunion.org/clients/71346/File/zemori.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/kotaweban.pdfIn PDF document text
    • http://pcserviszlin.cz/ckfinder/userfiles/files/dikijekanazinonajefowa.pdfIn PDF document text
    • http://aceranalitik.com/ckfinder/userfiles/files/vekagowuvuvefejegedojavi.pdfIn PDF document text
    • http://gasthaus-steinkirchen.de/img/editor/file/lejodomexej.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3a243a46b0---47686202120.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/kn9n51nb3sm16n8ivk49l0bg5h/nimikubopoxusibubito.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/mewowovawedowafebelesuvux.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/10029494017.pdfIn PDF document text
    • https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/81564643780.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/b18590a4c77c8e0bc2a2478ddd5b281c/gejej.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/51183373250.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed26b9bd84---pulakirulixukufoxijuki.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b9520f09a0b---16613820789.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/56688472974.pdfIn PDF document text
    • https://gofropack.com/wp-content/plugins/super-forms/uploads/php/files/a4a2c9d5d64861d27c9f37477b35fa47/figokutumekamuru.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1fad9a07e3---fepuvajaxe.pdfIn PDF document text
    • http://twtipa.com/upfile/files/2021/07/16/niguvamujuluvalosawigin.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/eac7t09nm23vf12r3s23vvjuc1/tojinenejulugowuronoli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=network+theory+questions+and+answersPDF link annotation
    • 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_off000109ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AB 10816 bytes
SHA-256: b6dfb045e29480a91dc931c307bcbea51e7b62286bc8031acf4c43c2e45e2cc4
font_01_sfnt_off00012275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12275 19348 bytes
SHA-256: a8ca53bf5195d707509b688324204ca10999b5fd33d6123d0b4f5ca73ed6a3ef
font_02_sfnt_off000156c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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