Malicious PDF — malware analysis report

Static analysis result for SHA-256 78ee764e1e6a6eef…

MALICIOUS

PDF

84.8 KB Created: 2021-01-08 23:25:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: dcb98cb9dc41266267c8faaae3cb782d SHA-1: 7a2ed2514b4edc59a994b174cd077924c77215eb SHA-256: 78ee764e1e6a6eef5f7f15e21bf76989cedc6e22e38dd8f8c94654e39a0d587f
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically identified as a malicious redirector pointing to 'https://gettraff.ru/123?utm_term=honeywell+pro+series+thermostat+manual+triangle+with+exclamation+point'. The presence of a large number of external PDF links, including one to 'https://s3.amazonaws.com/xopugup/gedugaxipetiwosonatexoz.pdf', suggests a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/123?utm_term=honeywell+pro+series+thermostat+manual+triangle+with+exclamation+point In PDF document text
    • https://pukelubaluwo.weebly.com/uploads/1/3/4/7/134741361/3309192.pdfIn PDF document text
    • https://zupavuzinopaz.weebly.com/uploads/1/3/4/2/134265708/zomasojapov_nasusikewato.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xopugup/gedugaxipetiwosonatexoz.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/afterburn_aftershock_sylvia_day.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b16708c7-08f4-449f-81b7-b74d33148326/40017636808.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/arrangement_of_electrons_in_atoms_test_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc5f20f4-4dfe-4d17-97e7-8d102937c87d/11943893529.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/gogifuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/streaming_video_er_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21366174-d3e7-4756-b5a1-18dab7254038/lujonagajolatigezi.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/22748159829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16f8512c-23ea-4d7d-9ae1-f96066640967/gamamipiretegoti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9105cfd9-7745-421a-a714-74a8d9f0389a/67201522052.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/534221c3-e3ca-4190-a84d-2f20eba56785/rukibirosadir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c8669b5-d836-4636-9cff-2b834c9a3465/wepuloxileladoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff4c434f-83c9-4bc5-9a72-dd9050033ad0/kofevofusufidi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3F 5452 bytes
SHA-256: cd4d8fa01556cab64a6258f7501987ea30b5f7ca4149f5eb7a2ab6624d6f8ec7
font_01_sfnt_off00010eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAF 11180 bytes
SHA-256: 434943016a0bc2919768d8612e566e540920d894f0ec857d0bbbbb789076fcd7
font_02_sfnt_off00013504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13504 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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