Malicious PDF — malware analysis report

Static analysis result for SHA-256 9434c2d7dff28f58…

MALICIOUS

PDF

73.1 KB Created: 2021-03-06 19:18:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8715aee8e8d37993733be75c23a1e395 SHA-1: 98aefc2b63ae2b78a1bee01eaadbbaff89e99100 SHA-256: 9434c2d7dff28f580c6cec236caaeeed5aff64e0577ff22c00dcbd8e21b8b209
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • 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://seumenha.ru/wix?keyword=skyline+hoa+anacortes PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465545/normal_600750852d335.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371495/normal_5fc62db55a168.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485572/normal_601a5703876f1.pdfIn PDF document text
    • http://waxenotesanil.22web.org/netipewetibemamevow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411511/normal_600204df5bed6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386354/normal_5fe48cecca7b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472776/normal_5ff820a113ed4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392854/normal_6035b569972c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369626/normal_5ff1b4dca631b.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/setikizo/12603_train_platform_in_chennai_central.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/malalobamoviketuwizojotow.pdfIn PDF document text
    • https://s3.amazonaws.com/padanivozeb/72827427986.pdfIn PDF document text
    • https://b03e51a8-7171-48c0-94d6-e4c032e6f37f.filesusr.com/ugd/9421c8_547f5c3cc1974b14a95d87d5d935806c.pdf?index=trueIn PDF document text
    • http://mewarur.rf.gd/america_s_got_talent_winner_2017_performance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bea5b41-61f9-4ea7-acf0-87e5dcb279dc/vuwejemotupusi.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/30380291329.pdfIn PDF document text
    • https://40785fcd-1e5e-4316-9306-5db1d5795eae.filesusr.com/ugd/2f07a1_cd098c25a4554b9d9adad6e623918f6d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tawovojo/13197990218.pdfIn PDF document text
    • https://fed4949e-3809-4fc0-a28b-84c5d390f589.filesusr.com/ugd/94482e_9209c909d9b449a3b004e9ff4e34d26d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/15210069-3486-4476-805e-c005fd6cf072/26032955143.pdfIn PDF document text
    • http://kagilabitivibe.epizy.com/titawuzuvagid.pdfIn PDF document text
    • http://fenulujexita.epizy.com/flying_fox_fish_care_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af7223f6-44c3-4c29-9e3f-bbc3d7eea9f7/how_to_use_gold_wireless_headset_on_ps4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a2aef64-a5d6-49c3-bf66-30bff67c821d/movurupenujaposuwama.pdfIn PDF document text
    • https://b32521b7-32ca-447e-9967-d27d0dce683d.filesusr.com/ugd/800b88_0becca6f53ba4129b0051de437e35be5.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d39a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39A 4944 bytes
SHA-256: eddc90ba4e8bd537f651f0fb3ea72ceb09d32e4eade9383bf5b694dbdfd6ddf5
font_01_sfnt_off0000e451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE451 10692 bytes
SHA-256: 7aafd851755ea7970d1b14e423fbf83e33b7aa113d674c73a19feca2ac51b095
font_02_sfnt_off00010875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10875 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34