Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d60a68bffa70aae…

MALICIOUS

PDF

83.7 KB Created: 2021-03-15 11:20:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: bbb08d66ec3648168dd3103730ec1170 SHA-1: 57f3ee28d52d1285c79bf16e23e00abc3cc456d4 SHA-256: 7d60a68bffa70aae87f14a66d1fb826b25cf771dd19cfc773a2190603d7fd133
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/strik?utm_term=marking+criteria+for+reflective+writing'. This indicates the document's primary purpose is to lure the user to a potentially malicious external resource. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=marking+criteria+for+reflective+writing In PDF document text
    • http://fastpysystem.online/53996424311zcgl0.pdfIn PDF document text
    • https://cdn.sqhk.co/duzupafuj/jcZZMgi/teripedowesitexijowopibo.pdfIn PDF document text
    • http://naturalik.fun/21477444078856bp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383791/normal_5ffbf2adbd7ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420902/normal_5fe175cd2e0e6.pdfIn PDF document text
    • https://cdn.sqhk.co/nakusunegud/bgchiif/world_peace_simulator_2015_hacked_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/xI0ieid/96246751156.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444374/normal_602199f5995d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487399/normal_5fd9155216315.pdfIn PDF document text
    • https://cdn.sqhk.co/pufuxarabo/kTyTU6X/chalo_na_wali_movie.pdfIn PDF document text
    • http://summ-ita.space/noxufejuwasur3p485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452862/normal_600c732e44540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427268/normal_603e891519b9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501998/normal_603e41b4ef820.pdfIn PDF document text
    • https://cdn.sqhk.co/kogeledewafo/089icgj/best_sea_battle_strategy_iphone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499285/normal_60159cd914a02.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/bulalowisu/cd_capital_inicial_acustico.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/template_syrian_iraqi_civil_war_detailed_map.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/facebook_and_twitter_video_er_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/genie_wireless_keypad-ic_programming_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/how_to_calm_cat_anxiety.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/tatavegupu.pdfIn PDF document text
    • https://s3.amazonaws.com/kimone/jai_bajrangbali_ka_photo_ing.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/sportcraft_1000_dartboard_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/lennox_pure_air_installation.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_off0000fe63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE63 4880 bytes
SHA-256: 48bf82b16e7a5734d0c12b03ef298bfc98ec673f535fb521a49c668aec77dfc0
font_01_sfnt_off00010f1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1D 10716 bytes
SHA-256: 1ba56e18b1eff16b7072ab90475d19251ee249418de4ebbbef8107d2830371fb
font_02_sfnt_off000133c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133C5 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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