Malicious PDF — malware analysis report

Static analysis result for SHA-256 192488f13f931089…

MALICIOUS

PDF

99.0 KB Created: 2021-06-12 00:27:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b3ba58686a30a33085447726e735c0cc SHA-1: 363c8acc892d73bfe5f083bfe3d14cbbd70cff66 SHA-256: 192488f13f9310894a07f19614eb7ce192475ba97db2b1b7e10df64cab9a6d66
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://krisoc.ru/uplcv?utm_term=the+wicked+king+book+review PDF link annotation
    • http://assushop.com/userfiles/assushop.com/file/jabolefaviluje.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/0473ddd06d0fa14c95e3c92d41149cd1/lawal.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/zezax.pdfIn PDF document text
    • http://lawrence-spruill.com/clients/42275/File/gulepunelenas.pdfIn PDF document text
    • http://ipllaser.in/uploads/74993325988.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/arokirujomowusiwinibivur.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb7a2b1b0e---wunebukovip.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/4905268d88a4ca0bc0ffc354fbcef11a/54938305636.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608460970f8ff---bapepuzavezegisamedav.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/t784mk1us6hum4ftnne5si2bh2/9054783215.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/c80cf87d11070d9c3373f6dd599d614e/59522369484.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/3661439262.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088083181298---33103854778.pdfIn PDF document text
    • http://aa-nusd.jp/92745629696.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607c280a6377c---zulopubaretip.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608633c8e3106---60070556326.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11163 6440 bytes
SHA-256: edf517a561ed5132c6c1d5718ac6ff9d870a00e6f43a91762fd168a2279cca75
font_01_sfnt_off00012159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12159 4796 bytes
SHA-256: f1f9600f6e9929b20fa729406f3926456ea9b093466a5915972a131c7a7916fe
font_02_sfnt_off0001319b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1319B 11336 bytes
SHA-256: 7e207800f2fe5e04901512b4a26cd05e4a7030b9590e249cf46f83c3475ee4f1
font_03_sfnt_off0001584d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1584D 16592 bytes
SHA-256: 70235017133c7c3c09c0e612523b34a348506e5f557fffeca92a68a909918cc2
font_04_sfnt_off00016ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16ECE 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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