Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b0bbb32f5b054d…

MALICIOUS

PDF

89.3 KB Created: 2021-02-27 10:07:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 064b6bfa90699b55e74f2278b510b812 SHA-1: d987d1daf9d83ef21cccb9ccbb24b9bdd3610d5a SHA-256: 60b0bbb32f5b054dd3c6be7541ad9bc6f974b51929609413032005d222792b02
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://fokemale.ru/aws?utm_term=m+a+pulgadas+cuadradas PDF link annotation
    • https://cdn.sqhk.co/zixifazod/Pfidijc/dijelerisoxuvonuke.pdfIn PDF document text
    • https://jusopusoguwukul.weebly.com/uploads/1/3/4/4/134494455/ad0e574515674.pdfIn PDF document text
    • https://cdn.sqhk.co/kenipafitu/gPjjjbS/vemidaniniriveloweru.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/wgeieW2/2210340547.pdfIn PDF document text
    • https://cdn.sqhk.co/bijozugetav/AjishbS/34636050949.pdfIn PDF document text
    • http://katermore.ru/wuwejarokererelaludexirovs5qzo.pdfIn PDF document text
    • http://moxufelomewiziw.iblogger.org/pdf_converter_professional_for_windows_10_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/hexujiE/71102190455.pdfIn PDF document text
    • https://cdn.sqhk.co/suxavawudomo/VjbXiea/wiwiwi.pdfIn PDF document text
    • https://cdn.sqhk.co/bojowagawire/PhhhiiN/ripibejalifiduzi.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/KFLqjfq/63365680478.pdfIn PDF document text
    • https://cdn.sqhk.co/pifixijowoka/akgijha/89341477106.pdfIn PDF document text
    • https://rimedugomo.weebly.com/uploads/1/3/0/7/130740195/wukepo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://toloruware.rf.gd/lazudexaxip.pdfIn PDF document text
    • http://pabizazixivak.epizy.com/xevikabix.pdfIn PDF document text
    • http://vipenugixegun.epizy.com/daluperedukofuvepanib.pdfIn PDF document text
    • http://tosowepexinuf.epizy.com/66033125142.pdfIn PDF document text
    • http://mujozigimak.rf.gd/nonigilegarur.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001269b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1269B 26740 bytes
SHA-256: 4b4af02196c4b615897f2db819cba9ea7dbaa9c815ab943de0046a1c99d94b77
font_00_sfnt_off0000eccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCB 5248 bytes
SHA-256: 81353939a789a0b0f27c5da00ff5cf2af2a4eca9d1ea23d04bb65c0444123f42
font_01_sfnt_off0000feb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB8 12148 bytes
SHA-256: ab531d2607c466920287a935443cf6275b78178c3f9cd61b2b56979eda928348

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