Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cf56c821ea8317f…

MALICIOUS

PDF

78.2 KB Created: 2021-04-06 15:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9cfd221b659372702b3b072538c865ac SHA-1: ed3b09ccc75cb75b23dac6ac0e23a3afcf18f72b SHA-256: 6cf56c821ea8317ff36bace3378858c3f951f3b2d31b760d9920cd6f023f598f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, suggesting a link farm or phishing attempt. The document body, though heavily corrupted, contains text related to starting a blower, which is likely a lure to disguise the malicious intent of directing users to external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://gimoguvi.ru/strik?utm_term=how+to+start+husqvarna+350bt+blower PDF link annotation
    • https://cdn.sqhk.co/pibexezases/hgdcqWU/47733011718.pdfIn PDF document text
    • https://fotawadibegul.weebly.com/uploads/1/3/1/1/131163643/lapefibuzigurovipil.pdfIn PDF document text
    • https://cdn.sqhk.co/nupegefozub/gh2HwPm/26362513999.pdfIn PDF document text
    • https://jowavuzawevubab.weebly.com/uploads/1/3/2/3/132303017/1282072.pdfIn PDF document text
    • https://cdn.sqhk.co/savujegu/QI13hjH/how_high_are_you_in_a_plane.pdfIn PDF document text
    • https://xeromikivato.weebly.com/uploads/1/3/2/6/132695960/8169ca.pdfIn PDF document text
    • https://cdn.sqhk.co/fowipovoji/Uieigjf/67985357220.pdfIn PDF document text
    • https://fomiradoxep.weebly.com/uploads/1/3/4/5/134512134/1149455.pdfIn PDF document text
    • https://cdn.sqhk.co/xijisejes/aaiHghh/wire_rope_cutter_harbor_freight.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://labireninofut.epizy.com/pajogapemi.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/how_to_clean_burnt_coffee_maker.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/36538412377.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/diagramming_sentences_worksheets_3rd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/tabal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57cb2531-99ea-4ce9-b676-007dfca6af9f/86676253480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f74309a5-ba0d-44e0-b110-d00eaf323428/55939184456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44c39526-6810-4b19-ba00-c8c604c35a8a/hoover_power_scrub_deluxe_spinscrub_50_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/27301659631.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/guges.pdfIn PDF document text
    • http://xajezenu.epizy.com/burirabopomokuxakebibud.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/asante_baba_remix_mp4.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_off0000f267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF267 5584 bytes
SHA-256: 32d6ae0b7ac91de1113d64626ea4596d484c009e348513cdb747fa5ac8a48cf0
font_01_sfnt_off00010575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10575 11148 bytes
SHA-256: ac37cd41461855c7cd9339a1e50af97e61285e172b82563cdef3f97ca0f0940d

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