Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd86f99753ff5405…

MALICIOUS

PDF

102.6 KB Created: 2021-05-12 12:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: eeb16b76c1bb1ac99208d0af9a00ac31 SHA-1: c80f670fba664d6d52023d25cb171b58c4c967f9 SHA-256: bd86f99753ff5405f2a181c8f80fb8b1bf108885e61b64b156b0e250c83fbf10
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to disposable hosting and are likely part of a link farm designed to manipulate search engine results or redirect users to malicious content. The document body, though heavily obfuscated, suggests a lure related to connecting a soundbar to a Hisense Roku TV, which is likely a pretext to disguise the malicious intent of the embedded links. The ML classifier and ClamAV detection strongly indicate maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://nipisod.ru/strik?utm_term=how+to+connect+onn+soundbar+to+hisense+roku+tv PDF link annotation
    • http://persequen.com/rekipixesoubhpk.pdfIn PDF document text
    • http://1fps.ru/garmin_oregon_600_review0hdg5.pdfIn PDF document text
    • https://finijigif.weebly.com/uploads/1/3/2/6/132681422/tenimamoratal.pdfIn PDF document text
    • https://dopakegufa.weebly.com/uploads/1/3/1/3/131384718/razidiwuz_jiwarijijuz_telituna.pdfIn PDF document text
    • https://sixixufur.weebly.com/uploads/1/3/2/3/132303163/fepebezos.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/wupiwupiwot/directv_wireless_video_bridge_connection_diagram.pdfIn PDF document text
    • https://1ec9b6e7-17eb-4e1e-a994-ba5ce4cbdb7c.filesusr.com/ugd/d4a9d6_ff465681729c4c54a8e31af11a974a33.pdf?index=trueIn PDF document text
    • https://fed4949e-3809-4fc0-a28b-84c5d390f589.filesusr.com/ugd/94482e_53df42e661b043fb84730cb7bb1d28b4.pdf?index=trueIn PDF document text
    • https://fa886832-b9e3-4ce5-a98c-97da2614721f.filesusr.com/ugd/9f8050_9a32e04311174bb9a5b564b3952c8528.pdf?index=trueIn PDF document text
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_3515c509ef614d59ab4da9a6fcc0ded1.pdf?index=trueIn PDF document text
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_cf70743f3ee24e94aad756832af8b35a.pdf?index=trueIn PDF document text
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_96f23260ba614ba8a3707b0d80c2d896.pdf?index=trueIn PDF document text
    • https://05efeaee-ea5b-4dc8-bddc-a5098cc0dcbd.filesusr.com/ugd/c06c30_0330386c7fdd48879e87d0bb9cb6dfed.pdf?index=trueIn PDF document text
    • https://1a413096-4115-453c-84a6-e19f3d0a1e7a.filesusr.com/ugd/4a2d03_982872ccbc14481db1f784f94bd8ab14.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/bewov.pdfIn PDF document text
    • https://56a7be67-7dca-40da-a973-69ad719fb73b.filesusr.com/ugd/fedf23_f25ffdf99aa940d9baa810d5dd473f58.pdf?index=trueIn PDF document text
    • https://c75ed97e-f406-4d79-b864-c99612e64be8.filesusr.com/ugd/a66d15_12c464e87e704bc68637db7bd0968f46.pdf?index=trueIn PDF document text
    • https://fa3f2985-242d-4a4c-93c0-6adbfb259eaf.filesusr.com/ugd/8dbe7a_983943e2c7054d8e88e501781de6a61d.pdf?index=trueIn PDF document text
    • https://4fd47d7d-96cb-4cdc-943f-55997d715fc9.filesusr.com/ugd/ab3424_fdbe942d71a248dd8ed5f67f6e4c5e07.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_off0001447c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1447C 5192 bytes
SHA-256: dfe9640e4f803de45f03e4a77b636cf95b7a30311a882414b3473a660d9d843b
font_01_sfnt_off00015624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15624 11948 bytes
SHA-256: 3c96fe0fabf3a68495ad805c63f14e9066ae15d080064bd234676eb976aabead
font_02_sfnt_off00017eb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EB0 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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