Malicious PDF — malware analysis report

Static analysis result for SHA-256 80dc25f1adab4d31…

MALICIOUS

PDF

80.0 KB Created: 2021-03-12 17:27:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ac40d038d9b885f2f97ed018b8d4ab63 SHA-1: cfdd19847fee9ff174c4e732775589c7360f712a SHA-256: 80dc25f1adab4d3116870098ff82e5d0079bac488706ca3632a7500bc3edda21
196 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing lure, employing SEO tactics and redirectors to lead users to external sites. The presence of numerous external links, including a link farm and a redirector pointing to 'dugedepap.ru', strongly suggests an attempt to trick users into downloading or accessing malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/123?utm_term=install+spanish+keyboard+android PDF link annotation
    • http://foyou.store/function_of_coelom_in_arthropodszjo92.pdfIn PDF document text
    • http://lutafem.getenjoyment.net/coreldraw_file_to_converter_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gujipiror/4hcWYBF/10417900694.pdfIn PDF document text
    • http://wordwild-store.com/difedobonawugulowilg8wq.pdfIn PDF document text
    • https://sanokigoj.weebly.com/uploads/1/3/4/8/134863934/teraxuxawaju-zozolepewinadig-wodidodosujin-xejirozizo.pdfIn PDF document text
    • https://leditolovon.weebly.com/uploads/1/3/2/6/132682688/zagexumewibog.pdfIn PDF document text
    • http://reweder.site/jiwasotadodad1gw02.pdfIn PDF document text
    • http://lenuvivureropi.scienceontheweb.net/56283780209.pdfIn PDF document text
    • https://cdn.sqhk.co/divabasom/IahaeOI/agatha_christie_s_marple_free.pdfIn PDF document text
    • https://kusavavatixe.weebly.com/uploads/1/3/4/8/134878613/notuki.pdfIn PDF document text
    • http://bukuminuwakub.mypressonline.com/do_you_check_power_steering_fluid_with_the_engine_on_or_off.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/cIgjfnT/94809135394.pdfIn PDF document text
    • https://cdn.sqhk.co/sazalevimit/iexgje1/gobusedu.pdfIn PDF document text
    • http://furniture21.online/zaziwowasebamozimhnl0.pdfIn PDF document text
    • http://ellmax-site.xyz/mabefuluxujeferoleniniz5lubz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/luborinizu/gijazom.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/1650262757.pdfIn PDF document text
    • http://sodowurivav.onlinewebshop.net/wepaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/sims_3_camera_sims_4_ps4.pdfIn PDF document text
    • http://tebaputazaxuva.myartsonline.com/how_to_change_door_direction_on_whirlpool_duet_washer.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/49024761140.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/witavanokisumowagoman.pdfIn PDF document text
    • https://forums.androidcentral.com/showthread.php?t=256650&s=822c5a5415ddc259f4d2a221fb1c18eaIn 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
    • https://forums.androidcentral.com/showthread.php?t=256650&s=822c5a5415ddc259f4d2a221fb1c18eaIn 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_off0000ef16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF16 5080 bytes
SHA-256: 5360e65cf3dfcadc35ac242089224747e387b02ba5558dbdfe3101ff2792b3b6
font_01_sfnt_off0001003e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003E 10364 bytes
SHA-256: 4ecd091c07c43cf287ed41ab133726433c9f03942c052d43ddb76e469878efeb
font_02_sfnt_off000123cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123CF 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361