Malicious PDF — malware analysis report

Static analysis result for SHA-256 570587946abc3546…

MALICIOUS

PDF

72.4 KB Created: 2021-05-11 10:35:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: be4787bdbf8f496db6a3df85cb7754a3 SHA-1: c577a1f8c4a0c0ef839441df95c7d7fbd6259adb SHA-256: 570587946abc35468ee057d0fc446399949629367dbe246d8f69ec267157796f
196 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is part of an SEO link farm and uses an image lure linking to an SEO redirector, suggesting a phishing or malware distribution scheme. The embedded URL and the primary redirector URL point to suspicious domains, likely intended to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent.

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.
  • 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=why+won%2527t+my+computer+connect+to+my+router PDF link annotation
    • https://mesajenijapab.weebly.com/uploads/1/3/0/9/130969967/xofaxulakoviw.pdfIn PDF document text
    • https://fotizewuzawefuv.weebly.com/uploads/1/3/4/6/134668380/18c2b.pdfIn PDF document text
    • https://voxapinave.weebly.com/uploads/1/3/2/7/132740917/72be6e3eeac.pdfIn PDF document text
    • https://kewekekonuv.weebly.com/uploads/1/3/4/7/134732265/bunetike.pdfIn PDF document text
    • http://appeal-ig.com/5655600460513i88.pdfIn PDF document text
    • https://cdn.sqhk.co/ketegobuto/cji5gjV/judicial_activism_vs_judicial_restraint_worksheet_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/runudori/6iivAYq/the_factory_church_live_stream.pdfIn PDF document text
    • https://wedovaxebekusos.weebly.com/uploads/1/3/4/6/134634127/zufix_zibawazerelow.pdfIn PDF document text
    • https://cdn.sqhk.co/xeliwiwogivo/dhc5Uid/ball_fall_3d_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/metakibeme/project_financial_report_template_word.pdfIn PDF document text
    • http://rokodejufoda.rf.gd/vadupibonuwolulu.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/nasagajegadivomapod.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/john_c._maxwells_a_lifetime_must_read_books_list._5.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/the_long_lost_friend.pdfIn PDF document text
    • http://dutinafojev.epizy.com/derisunapasurofewuzof.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF78 4996 bytes
SHA-256: 1a901bf60890553813e1132cc1f71c559047fe5cdbb34b414ea3a6844cc5c504
font_01_sfnt_off0000f074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF074 10612 bytes
SHA-256: aedde9a2d130cd702d63e3845ab5c8fd1dec12f292590adf04ad22c6fc016bb4

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