Malicious PDF — malware analysis report

Static analysis result for SHA-256 a34bbf83ad09cadd…

MALICIOUS

PDF

78.4 KB Created: 2021-03-22 17:16:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 138ef9b2eead2822c7221c246f95efd8 SHA-1: cb3b990bdc5d61b4606acd013b389bccc429bdfe SHA-256: a34bbf83ad09cadd5c04ca2aecc164e934d65108b55c94c5b5efc890bbaafc81
134 Risk Score

Malware Insights

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

The file is a PDF document that contains a lure for downloading content, indicated by the 'SE_DOWNLOAD_BUTTON' heuristic and the embedded URL pointing to a movie download keyword. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or trojan delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing attack, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=ekkees+toppon+ki+salaami+movie+download PDF link annotation
    • https://cdn.sqhk.co/nomitusibop/iiGvidc/zombie_frontier_3_unlimited_hack_mod_apk_download.pdfIn PDF document text
    • http://ridunculus.com/77913151530hj4ue.pdfIn PDF document text
    • http://storeplus.pro/3981240619540o1t.pdfIn PDF document text
    • http://smartline58.ru/fibivufesamegivegufuxidigyl.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/fl2jahj/66769767709.pdfIn PDF document text
    • http://idealicaitalia.website/rekoverun98gga.pdfIn PDF document text
    • https://cdn.sqhk.co/faxixuwako/4ib6ii8/85760362117.pdfIn PDF document text
    • http://samoe-samaya.ru/957929666359cm9k.pdfIn PDF document text
    • https://cdn.sqhk.co/mofosalamo/AgcLulD/coin_master_hack_cheats_unlimited.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e9abb47e-19e5-4ec2-9f3c-2aa4e6f2bf0a.filesusr.com/ugd/92be99_2a7dda99b7a943c199c23a9510da1343.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fizup/derofoxekukula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/523e16d5-ec13-408a-87f6-fda7ab97b73a/we_should_all_be_feminists_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/android_studio_old_versions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46c16493-97e3-4096-b72f-f5f1db98d3fa/fiwikisemisanotababumaje.pdfIn PDF document text
    • https://f18b8dc1-3ce9-44bd-8712-01435d039869.filesusr.com/ugd/b97cba_60c15a43e18d4a63a7a2dec3f48af468.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3731fe3d-4d80-4a73-86aa-9e0efe8d581e/how_to_use_a_coleman_gas_stove.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/pilot_games_for_pc_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13851cf3-721a-437c-b7cd-c241449eafe8/xebumerizut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da21e023-56c2-4185-bbe3-bd242528d638/dunkin_donuts_matcha_green_tea_latte_with_almond_milk_calories.pdfIn PDF document text
    • https://35b1a599-9f45-4897-82ce-59a931fc5495.filesusr.com/ugd/daca0d_0555bff3fd4e4b67a1848b7753c7792e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0290cb93-90f6-4d23-a61d-e8354c68f7c6/master_of_orion_2016_gameplay.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/zamemadib.pdfIn PDF document text
    • https://855e1e5b-0daf-4dce-aa73-dfad2bfec5df.filesusr.com/ugd/ced2dc_dfc40e7855674f828588894ab7517b91.pdf?index=trueIn 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_off0000f645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF645 5180 bytes
SHA-256: e708a415344ee461a272d74ff31d5893e06767b5b6d454950612dee402e4c97d
font_01_sfnt_off000107ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EC 10584 bytes
SHA-256: 502be17af01b41eece681c969cbc3b24d16a5c253a55967b502c05f1dc0888b4