Malicious PDF — malware analysis report

Static analysis result for SHA-256 844b29d7777e0500…

MALICIOUS

PDF

77.5 KB Created: 2020-11-24 12:29:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d1e85facb5a7be64f6d22c60c26c338d SHA-1: 1226eee80eec6f1aab332171357432e4669b3f8a SHA-256: 844b29d7777e05002cf11e994437d402d177429ad6103aa7f963465fe5e83f9d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://traffine.ru/strik?utm_term=netgear+wpn824v2+openwrt'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/strik?utm_term=netgear+wpn824v2+openwrt In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374207/normal_5faf5f89234fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5fa4ead990dac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393751/normal_5f93b0f45c287.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382189/normal_5f8d623be49cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417413/normal_5f97cdbfbb976.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_5f894287ba13e.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0f324c4-c230-4df2-9d49-ae35e813f55b/deadpool_2_full_movie_watch_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05eceae9-7cc7-4a53-b347-a19385d19eb9/65872814953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13cc2522-6322-4d84-a5c6-6e8db8c1dd7e/bivavibisoxiwoxebunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afb56202-3a62-436d-b9b9-7ab45ea9a99e/nearest_car_wash_to_my_location.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6558a9ef-4f81-4b27-9239-34385aba0229/tokyo_ghoul_touka_death.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/free_whatsapp_status_video_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e60aeb7d-6bf9-4701-ade5-2e79826bfcda/lopajafovububivowuwumilu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97a73163-731d-48b9-97ed-038afa5d3f4c/pikepiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a02d1e8b-a3c2-4af0-9dd9-73c9d8da4b48/rekatekububijoribe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09f22d5f-5223-4993-ac2f-34b729876bc7/jakoxilefij.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/ravega.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000e466.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE466 11652 bytes
SHA-256: 44cf0429f320b327fcdef59df434b28739853cd404341898e41cf692d8fe4a99
font_00_sfnt_off0000d226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD226 5312 bytes
SHA-256: 5de5034491bd7f0e5dcc9c137c5afb869be98e5ead260f5f05781029f72fa239
font_02_sfnt_off000105c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C3 10240 bytes
SHA-256: 57d64aba3ef1b741a7b77a30cc5e860ce609b7656a38edddda1042c0ba9f9b40

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