Malicious PDF — malware analysis report

Static analysis result for SHA-256 71b4d7332e235077…

MALICIOUS

PDF

71.8 KB Created: 2021-03-05 15:44:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: cedb5ca4d94a372b36a77a66d75f0786 SHA-1: 9e34012da6075ac5d1a7cd4a6085f612109d6728 SHA-256: 71b4d7332e235077eabfa266073d5ebeda5cdc0052a43d81ecd0f9b947856f58
214 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, likely to trick users into downloading a fake Minecraft APK. Heuristics indicate the PDF is a malicious redirector and part of a link farm, and ClamAV detected it as a phishing trojan. The embedded content, though obfuscated, suggests an attempt to disguise the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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.
  • 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://crophysi.ru/wix?keyword=download+minecraft+pe+apk+1.14.60.5 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4372100/normal_5ff7f5060152b.pdfIn PDF document text
    • http://flipping-car.online/226263329051iuwv.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/afnja0r/smartthings_motion_sensor_user_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489054/normal_600b20bac597f.pdfIn PDF document text
    • http://groby-ritual.online/vemokijm5cx.pdfIn PDF document text
    • http://fbcopyright-center.com/best_scorer_champions_league_2020umhja.pdfIn PDF document text
    • http://amsidisi.xyz/wosafegonidjw7u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_602dd811b1dd8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420592/normal_60070d8cf2d84.pdfIn PDF document text
    • https://cdn.sqhk.co/bevoroxur/nLheEhj/zudeneteraniside.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/aU3lgdA/santa_run_4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393486/normal_5ff409ebc60a1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/fusizaw.pdfIn PDF document text
    • https://4b0cdf75-2e42-4830-99f1-bbdbaec3f661.filesusr.com/ugd/891219_03f035df4c6849338a4d03fbc0fb73dd.pdf?index=trueIn PDF document text
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_f7d42af8ec244f6fb43353c6da2561d1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/15954553666.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/corona_borealis_guide.pdfIn PDF document text
    • https://54a0e2cb-796f-4f80-9aaf-d11633176b06.filesusr.com/ugd/b0c554_0b2f6b817a8241e2a25c53e93c59290f.pdf?index=trueIn PDF document text
    • https://4cd5eafb-d261-4666-a528-29b55b1676c1.filesusr.com/ugd/8dde66_c3f41bd4d0734e55991a7b30a0332e02.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/android_phone_hardware_test_code.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/nozar.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA67 5872 bytes
SHA-256: 64211f7ee3d1114defc579ce7dee40c8473d46c7fdd2d6b835c71ecc7726015b
font_01_sfnt_off0000ee79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE79 10240 bytes
SHA-256: 2b1c2e9adeb48ba6e29a7c38f0ee4454a1d1684c797a9456a1ccca30a8c73213

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