Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d59e1dda0af4bc…

MALICIOUS

PDF

96.5 KB Created: 2021-02-28 02:02:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: aad2f4a3a92d504a0280bac06c14ad9c SHA-1: e4dad13d24298d49eba5e46beadbb4195b544c05 SHA-256: 62d59e1dda0af4bcbf065db43d2ddc58855bf2f7449a931c661d9dd19271287f
156 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are hosted on Weebly and appear to be part of a link farm designed to improve SEO for malicious content. The primary URL, 'https://midufefew.ru/strik?utm_term=how+do+i+get+an+arborist+license', suggests a phishing or scam lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/strik?utm_term=how+do+i+get+an+arborist+license PDF link annotation
    • https://dazuvekojuj.weebly.com/uploads/1/3/4/8/134863877/e898650f7.pdfIn PDF document text
    • https://ramokazadi.weebly.com/uploads/1/3/4/4/134470245/813b983fdf.pdfIn PDF document text
    • https://daxexamuve.weebly.com/uploads/1/3/4/4/134446800/9836441d4cc.pdfIn PDF document text
    • https://woveguzusozor.weebly.com/uploads/1/3/1/3/131383383/56e21f158e.pdfIn PDF document text
    • https://salexutoxor.weebly.com/uploads/1/3/4/7/134761189/dovigitegijo.pdfIn PDF document text
    • https://somusepuxe.weebly.com/uploads/1/3/1/0/131070447/pikisukipajomamix.pdfIn PDF document text
    • https://padilokemim.weebly.com/uploads/1/3/1/3/131381900/5955f45432.pdfIn PDF document text
    • https://fubexomufepa.weebly.com/uploads/1/3/4/8/134850999/sujuguze_wikifa_wepegiwomike_jevodutav.pdfIn PDF document text
    • https://govalusazun.weebly.com/uploads/1/3/5/3/135325024/2245122.pdfIn PDF document text
    • https://fogebutozedelig.weebly.com/uploads/1/3/0/7/130776223/7d54fd75761.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/gurafoga/nirvana_heart_shaped_box_tab.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/xopiregiruviva.pdfIn PDF document text
    • http://dilepivulibav.epizy.com/you_are_my_sun_my_moon_and_all_my_stars_quote_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/chilled_water_piping_design_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/rubber_gasket_sheet_1mm.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/pumirare.pdfIn PDF document text
    • http://fijetetesozaw.epizy.com/pefurugewiwaxapezerebaja.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/leladasojubibuxiwabujeme.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/steam_for_mac_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/audio-technica_at-lp60xusb-bk_fully_automatic_belt-drive_stereo_turntable_black.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F3B 3508 bytes
SHA-256: 8214d3a67577e95c3033b66739ed2706cbeb4aab89f0e91e8d07aeea8d2053c5
font_01_sfnt_off00013bcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BCF 5300 bytes
SHA-256: 63149601a3335301d338625fb4ba93d50afdfebac99083193640776a7b42cd7d
font_02_sfnt_off00014df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DF0 11256 bytes
SHA-256: 400a8e118333a788a6616d037d26ca8e595e227bb2121636d11bcaa088e4d32f

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