Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c0301cc21d71ac…

MALICIOUS

PDF

84.7 KB Created: 2021-03-16 10:41:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 334eab57374394b7a2c98d638936b390 SHA-1: 0e828525c11a75119e037fa2edb42fbc5d05c4ac SHA-256: 32c0301cc21d71ac0c9fcbc4c79c5dd127936e3845b319d6dc414392d797bd1e
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to SEO-optimized PDF files, suggesting a link farm or redirection scheme. One prominent link, 'https://ponafet.ru/strik?utm_term=night+work+that+pays+well', is identified as an SEO redirector for free-download phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ponafet.ru/strik?utm_term=night+work+that+pays+well PDF link annotation
    • https://pawomasa.weebly.com/uploads/1/3/4/7/134737305/7935438.pdfIn PDF document text
    • http://bofinaposo.iblogger.org/chhichhore_movie_songs_zip.pdfIn PDF document text
    • https://lufaranari.weebly.com/uploads/1/3/4/6/134689474/685bb73e364f3.pdfIn PDF document text
    • https://lonexababite.weebly.com/uploads/1/3/1/1/131163854/wepuwoti_jepeduwu_wilolosu.pdfIn PDF document text
    • https://dotanivim.weebly.com/uploads/1/3/4/7/134705276/8136240.pdfIn PDF document text
    • https://bapepewemeg.weebly.com/uploads/1/3/4/7/134702997/34385f99890.pdfIn PDF document text
    • https://xirabefutabo.weebly.com/uploads/1/3/5/3/135323672/fa739dd747be121.pdfIn PDF document text
    • https://fubapisa.weebly.com/uploads/1/3/1/4/131406294/70803fa71.pdfIn PDF document text
    • https://muwalivom.weebly.com/uploads/1/3/2/6/132695892/vosav.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
    • https://s3.amazonaws.com/duzexefemosaxe/friction_worksheet_7th_grade.pdfIn PDF document text
    • http://vexiwiwapawu.epizy.com/45650969919.pdfIn PDF document text
    • http://xerefigirusew.epizy.com/nerififipujugivide.pdfIn PDF document text
    • http://lokemupuwife.rf.gd/ut_calibration_procedure.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/asoka_movie_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/58119169877.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/nursery_school_admission_form_format.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/how_much_to_replace_ceiling_joists.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/jenevuxu.pdfIn PDF document text
    • http://levapen.rf.gd/midun.pdfIn PDF document text
    • http://pamilov.epizy.com/hitachi_c10fch2_review.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://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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6E 4988 bytes
SHA-256: aa681682fa2b01de8edc4887a8ee860e531c1c35b0f93a4650e1586ca4f12982
font_01_sfnt_off0000fd96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD96 10748 bytes
SHA-256: b8f27d0b98f37596c15f0eec1b2f79faa3a1debd68ea2314c6de415c07bfec38
font_02_sfnt_off0001228e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228E 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90
font_03_sfnt_off00013725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13725 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378