Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b79cf7a6d785954…

MALICIOUS

PDF

107.0 KB Created: 2021-01-20 23:59:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9b901dfdb49a648f09db4e803329a229 SHA-1: 491add42f86004ee9a748e6ab67867c0a6cd0fc6 SHA-256: 7b79cf7a6d785954a7f9148ec7c6dfc28ba2d1c3dffa27b75e4eccf0ad001dae
174 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though obfuscated, suggests a lure related to an 'answer key'. The presence of multiple embedded URLs further supports the malicious intent of directing users to potentially harmful content. No scripts were extracted from this sample.

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://traffking.ru/aws?utm_term=answer+key+great+writing+3 In PDF document text
    • https://cdn.sqhk.co/xumirikebixo/iabgejg/zombie_blaster_nerf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365655/normal_60027e19b53fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469641/normal_60034242bdeed.pdfIn PDF document text
    • https://cdn.sqhk.co/wusoxopejezo/jbhdjfj/73429280799.pdfIn PDF document text
    • https://site-1192612.mozfiles.com/files/1192612/55070010790.pdfIn PDF document text
    • https://cdn.sqhk.co/pixisuja/jthb7tu/bozezedizepibaremut.pdfIn PDF document text
    • https://cdn.sqhk.co/fegukajebaj/MOzLggX/10557525700.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/bfif8hm/racing_boat_motors_for_sale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454289/normal_5fe6fe781d96d.pdfIn PDF document text
    • https://cdn.sqhk.co/rukokota/eemichb/qr_code_scanner_app_for_iphone.pdfIn PDF document text
    • https://site-1174906.mozfiles.com/files/1174906/nawetatifalifakozotupup.pdfIn PDF document text
    • https://cdn.sqhk.co/satofapo/fieicgg/dungeons_and_dragons_online_class_list.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450440/normal_5fcbfa87708db.pdfIn PDF document text
    • https://site-1177815.mozfiles.com/files/1177815/nibapovilina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422622/normal_5fa1e4fad8b1a.pdfIn PDF document text
    • https://cdn.sqhk.co/febenanedibu/RArggjh/wwe_mayhem_mod_apk_v1._13._374.pdfIn PDF document text
    • https://site-1171954.mozfiles.com/files/1171954/xoraveletufujuvinu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381788/normal_5fc43361a511b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478961/normal_6006ca5ea19b5.pdfIn PDF document text
    • https://cdn.sqhk.co/raxinosi/UhfheqJ/lukeworenepele.pdfIn PDF document text
    • https://cdn.sqhk.co/fabukujeb/fgetWjb/finders_keepers_full_movie_free_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000163b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163B7 5232 bytes
SHA-256: f8a525e6bd9524744694b6c95411df87c0ac3ab0febc08f19e5e5a96ae66ac61
font_01_sfnt_off000175b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175B5 12080 bytes
SHA-256: a38f6cd23c8da83fb2d2ba219a001ed74e5c94c30de47048cfcc984710c0b2ad

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