Malicious PDF — malware analysis report

Static analysis result for SHA-256 882cbf1159e610ec…

MALICIOUS

PDF

70.6 KB Created: 2021-02-11 23:45:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b326da50a360448245a25ede2f51169 SHA-1: d0b84003c1bc223a513de1ac02f54e18a2b0198e SHA-256: 882cbf1159e610ec9f16f2fadf5a7365447f61975167eedf93ffda89a41b7e38
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of external URIs points towards an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wix?keyword=dragons+world+egg+guide
    • https://gatodewa.weebly.com/uploads/1/3/4/6/134627503/jasujatofigalunikod.pdf
    • https://tulaliferejuza.weebly.com/uploads/1/3/0/7/130775137/6723717.pdf
    • https://mabobuloxulekev.weebly.com/uploads/1/3/4/6/134692970/suzefulosutarejubemi.pdf
    • http://dabuvede.66ghz.com/secure_vpn_free_online_privacy.pdf
    • https://cdn.sqhk.co/xejexeremiso/tje4hgH/colour_changing_apple_light.pdf
    • https://cdn.sqhk.co/rolidofajug/haLMhbk/extreme_car_mountain_climb_3d_model.pdf
    • https://cdn.sqhk.co/dowivita/HAjbges/billie_eilish_wallpaper_iphone_11.pdf
    • https://giwelexe.weebly.com/uploads/1/3/0/8/130814055/438d0170ee.pdf
    • https://cdn.sqhk.co/genizataxom/shjgfhg/33582487096.pdf
    • https://cdn.sqhk.co/seseniluvus/jt0ifjd/hand_tossed_pizza_hut_calories.pdf
    • https://cdn.sqhk.co/zejizoguzut/he5hgie/ninja_foodi_grill_xl_6_in_1_accessories.pdf
    • https://cdn.sqhk.co/siloneza/K8ieQjd/nail_art_designs_flowers_step_by_step.pdf
    • https://wadezadoli.weebly.com/uploads/1/3/0/9/130970015/70314.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/getizar/filemaker_pro_12_for_mac.pdf
    • https://s3.amazonaws.com/liwafo/78601067125.pdf
    • http://jovovifanovire.rf.gd/14037271585.pdf
    • http://jabepujun.epizy.com/65301127046.pdf
    • http://porokeziz.rf.gd/depression_questionnaire_form.pdf
    • https://s3.amazonaws.com/nagev/properties_of_nanomaterials.pdf
    • http://sevetise.rf.gd/mtn_bursary_application_form.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dada.bin
d08b47108c8b7466c4e5091e121c576c3dad88c75d92ff2f14df180c430afd92		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDADA 5084 bytes
font_01_sfnt_off0000ec45.bin
858f8e8c3675f80ab7b7ac548c17c8c2cafd0d05d761ca184e02b402eb137add		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC45 9780 bytes

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