Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e150bb63e9f56ae…

MALICIOUS

PDF

73.9 KB Created: 2021-04-15 05:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 49de2c05f56db6f0ba81b05b7b0a30fe SHA-1: db69ce645b9885f7afdae20641b2e20303300e75 SHA-256: 1e150bb63e9f56ae8d8a075492e26ab6e180765edba289d8715c09a4d58c2ce8
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many pointing to disposable or unknown domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of numerous external links suggests an attempt to lure users to malicious content.

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://resalured.ru/strik?utm_term=pack+n+play+weight+limit PDF link annotation
    • https://xewoweduvaji.weebly.com/uploads/1/3/4/6/134680405/munipewifeludegido.pdfIn PDF document text
    • http://palaxofivuleduj.medianewsonline.com/bissell_powerfresh_steam_mop_replacement_pads.pdfIn PDF document text
    • http://wunadimizurened.medianewsonline.com/28173569000.pdfIn PDF document text
    • https://pofisuxix.weebly.com/uploads/1/3/4/0/134016862/b1433c77.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/bjbpvXU/digidesign_mbox_2_mini_usb_audio_interface.pdfIn PDF document text
    • https://mirodogewe.weebly.com/uploads/1/3/4/8/134861862/kawesig_zodifevelifarep.pdfIn PDF document text
    • https://cdn.sqhk.co/zuwiwejagub/sYXjd5m/12367738514.pdfIn PDF document text
    • https://cdn.sqhk.co/fowurona/dlijidl/vampires_netflix_trailer_2020.pdfIn PDF document text
    • http://pusovemolexed.scienceontheweb.net/sixuvowixulixi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f4a8f87-36cd-434e-8414-c2eaf5ff4fe1/42775531711.pdfIn PDF document text
    • https://651f5d5e-5f42-4fb0-8380-889764ca350f.filesusr.com/ugd/b2f7c1_1c7f70bfb2e041aa956d27be28fd6bd1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/245d6467-565e-462a-b389-e21ef6b294bf/how_to_repair_vizio_sound_bar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f8c2099-18a0-4c5c-b4ec-4c3bffccf527/zotubirubidedi.pdfIn PDF document text
    • https://4ac36a2f-1533-488b-b282-cf34cdace458.filesusr.com/ugd/bcfc12_fd4ebfdface0462abab3b1997018fe40.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc60e6b9-6de1-40ba-aefb-f94c4b462f3c/85327571189.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1d374ab-d703-4e22-b06c-7a80cdd3a6a3/92362585475.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE400 5332 bytes
SHA-256: d19fc690dfe69e3377eb4f63564ee676a946064fc589a73720aa0ad688f6a531
font_01_sfnt_off0000f623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF623 10656 bytes
SHA-256: 98cec637d1bd4394c79143062b17bb2050f536d9d31a3b6a09c2e1a634d82700

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