Malicious PDF — malware analysis report

Static analysis result for SHA-256 045830dca69c3ec2…

MALICIOUS

PDF

88.8 KB Created: 2021-03-11 00:16:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 690fa8c378987ec7718285410930bfc7 SHA-1: c5038bb092baa5c3cefd0d0045cb0d020340d037 SHA-256: 045830dca69c3ec23f4868aa08dcb0ac45d7b10370661a599147f41b62a8b6eb
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam tactic. The document body, though heavily obfuscated, appears to contain keywords related to product searches, likely intended to deceive users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/aws?utm_term=samsung+galaxy+s9+plus+used+price+in+pakistan PDF link annotation
    • https://cdn.sqhk.co/moxibusas/KdjjBid/loop_recorder_device_medtronic.pdfIn PDF document text
    • http://kufafukedexepix.mygamesonline.org/dell_active_pen_pn556w_tip_replacement.pdfIn PDF document text
    • https://cdn.sqhk.co/tevimuwijile/gPLj21P/fixilevotamipezila.pdfIn PDF document text
    • https://cdn.sqhk.co/zowolanazew/hbvicjc/60451297300.pdfIn PDF document text
    • http://psylath.com/75767349166kiugy.pdfIn PDF document text
    • https://cdn.sqhk.co/xodakebebit/viaXjjd/tulitanawizazij.pdfIn PDF document text
    • http://wabaxifejem.sportsontheweb.net/how_to_restore_a_polaroid_tablet.pdfIn PDF document text
    • http://pedrons.space/23753302783eaup3.pdfIn PDF document text
    • https://cdn.sqhk.co/jabuvilir/hcgfPhV/pool_billiard_free_download.pdfIn PDF document text
    • http://simamopi.22web.org/canon_4000d_manual.pdfIn PDF document text
    • http://pafunote.iblogger.org/33535972501.pdfIn PDF document text
    • https://cdn.sqhk.co/lakuziwi/heidEYx/jewabuxiximalirowuzajo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_a321ca8e404249acaf20b3c8bef83f31.pdf?index=trueIn PDF document text
    • https://8e321adc-6903-4917-82da-2ea11f77ed16.filesusr.com/ugd/c4dbd3_4d2c72639a714b94b7061f16f0fcad06.pdf?index=trueIn PDF document text
    • http://vabuperupijod.epizy.com/75022951204.pdfIn PDF document text
    • https://02bc4616-4eae-4b38-b2c9-0e654f754ee0.filesusr.com/ugd/069df5_5879b3464d334a128fd769ffa89f7ef3.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF0 5884 bytes
SHA-256: 94a663b2eb8f96e1f9832347a59ffbe22302fc055c9ba119e2c0bfad43766bf0
font_01_sfnt_off00012fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FED 11256 bytes
SHA-256: 866ae2ae2fea6d884be880fd365ae0c2f0084cabae429c0f6d0b8457151fa34e

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