Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5c5330aa1988be2…

MALICIOUS

PDF

166.8 KB Created: 2021-06-08 20:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 526e1b43c7206cfdb4b13b7103f14e9d SHA-1: f3b12705ec8889a6c5b0e2f9addcb90af02f5e72 SHA-256: d5c5330aa1988be2af220849e55a1135bd65b71167e1fd1207f370c9649e0bf1
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution campaign. The heuristic 'SE_CALLBACK_LURE' indicates the document may be designed to trick users into calling a fraudulent support number, further supporting a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://allytemp.ru/uplcv?utm_term=biochemistry+mathews+4th+edition+pdf+free+download PDF link annotation
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16072f2685db81---85515590332.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a651857d24c---wakeriweladufuzas.pdfIn PDF document text
    • http://eiak.org/upload/editor/files/tilul.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/84d46ac39f495b89fa7a3a64abad8dc8/23024408327.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/70669109213.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/8qt4ap2id90rdgol97s32tc091/getodadexiboxosuw.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/12147142530.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/xidosolofutovogojidegur.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f36e1cfbf---wixezokowiperagoxara.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2b5b12b36a50ff8027a09e5480207729/roketotutogodijimexatite.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/minuwozapavabinafosofapan.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/wegulijek.pdfIn PDF document text
    • http://artospace.com/pics/file/vixawukijojegibebunepi.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/dee1322f56a7e45c4001f50e2327ca72/40959605525.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/3mfnhv0ukahaqaqfhsdi3338kf/17703880655.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/83fc8d0f121418e64ff5f2a78e0facf3/gutadov.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608019969ae76---parezugamo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://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
    • 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002293b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2293B 5724 bytes
SHA-256: e9c453914433d90f77907a7a942ba42ea0031fa15673e3a9080e698a5ac7a479
font_01_sfnt_off00023cac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23CAC 13360 bytes
SHA-256: f994a5577bad9c76eb9241ecd231b0baae8360fe23e31792f419a1e04b2bf591
font_02_sfnt_off000268e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x268E3 16072 bytes
SHA-256: 5daa2859ac1cba10c019d93b3654b7392607614b218f12f6681e5ae5f126ae4f
font_03_sfnt_off00027d80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27D80 6076 bytes
SHA-256: 840c58a04c148f217c10df8559fdc0a795eb33ee1fd4885adad6976371aecbc5

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