Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd2691d3ca3acfd4…

MALICIOUS

PDF

86.7 KB Created: 2021-08-06 22:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 745173339cbf4e37a3bd3f6dc679120b SHA-1: ee3520b686498842dd31aad2d73d2dc93629ca0a SHA-256: cd2691d3ca3acfd4fd7794b94dbe7416508dcdd5072ad7e1e6423f03e9e61dc4
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal a link farm structure, with multiple URLs pointing to compromised WordPress sites and an IP address, likely serving as a lure for users to download further malicious content. The presence of 'utm_term=download' in one URL suggests a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608fcc04cdc91---xofiki.pdf In PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160917e49e9db9---40352485784.pdfPDF link annotation
    • http://accessiblevehicleservices.com/userfiles/file/62509939952.pdfIn PDF document text
    • http://derma-dts.de/files/file/vexov.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/42fdbc9e9bf5767e1f0c68e3df95a609/44955371525.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160b7844cb8024---femijafu.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/bibenekedere.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16071772f7e2e0---dojaxiwaligoro.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160741c2eebf98---60168487263.pdfIn PDF document text
    • https://srmresidences.com/images/bulk_images/files/memafed.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1faadd3c70---82059728926.pdfIn PDF document text
    • https://texigo.tw/upfile/files/2021/07/17/69218797691.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/xekesiregavovijuxame.pdfIn PDF document text
    • https://e-uchebnici.com/img/file/xipomoturuxexoguga.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a356396386c---dexusugureli.pdfIn PDF document text
    • http://lnimeina.it/userfiles/files/45783429277.pdfIn PDF document text
    • https://amblamy.ee/upload/file/pupawanixakerusagizunufes.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/3675565490.pdfIn PDF document text
    • https://gw21.ch/uploads/userfiles/file/19664143183.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/40223112027.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/virazotulinovu.pdfIn PDF document text
    • http://immobilieninvestors.org/userfiles/file/35175752681.pdfIn PDF document text
    • http://iburgisidimarsala.eu/userfiles/files/valubakemubadenuwewaka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=download+lagu+sonia+cinta+gunawan+wapkaPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71C 10736 bytes
SHA-256: 3c45627a55907b8994f1960b467bb441a3bd040a7bd89e2414b6de23191f9011
font_01_sfnt_off0000efc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC2 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
font_02_sfnt_off00010538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10538 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00011d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4A 17856 bytes
SHA-256: 69377c7d2fb9826287f3778e6c18cc624744d839f048ccdc596ee72fccd87da2

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