Malicious PDF — malware analysis report

Static analysis result for SHA-256 748acb9238112de0…

MALICIOUS

PDF

82.9 KB Created: 2021-03-05 16:43:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fc9e8a133ce0d559f800e5df5bbf889c SHA-1: 461bab0fc6a4d2e850574d9cbbd2f9120ebed8f4 SHA-256: 748acb9238112de00a9f6fc761e9f81cbb631808c57249e89e076992b59e0aa8
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or redirection strategy. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains text related to search queries, suggesting a lure to drive traffic to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 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.
  • 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://botokaw.ru/wix?keyword=what+does+the+word+ben+mean+in+hebrew PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389816/normal_60255986d6116.pdfIn PDF document text
    • http://suwefazimim.medianewsonline.com/dsc_impassa_reset_master_code.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/lonulowarukiwafej.pdfIn PDF document text
    • https://dumaxenuwumav.weebly.com/uploads/1/3/3/9/133997891/6181130.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476437/normal_5fd97ce48fd3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486981/normal_5ff98539e3485.pdfIn PDF document text
    • https://fuguxowaponiv.weebly.com/uploads/1/3/4/6/134648792/2696959.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374371/normal_603a745a1d012.pdfIn PDF document text
    • http://majikok.mygamesonline.org/it_jobs_in_demand_in_south_africa.pdfIn PDF document text
    • https://muzokive.weebly.com/uploads/1/3/4/4/134498707/18c7c69bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369486/normal_5fe2680331491.pdfIn PDF document text
    • https://vugawijop.weebly.com/uploads/1/3/4/5/134594760/wodozeberufapejujoz.pdfIn PDF document text
    • https://maxafusisiwesu.weebly.com/uploads/1/3/4/6/134688878/pojidusine.pdfIn 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/e4f87449-c32e-42fa-8176-49c09f3b1fe5/lujizatijatixeg.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/96684417001.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/nulegifiwejusebemukujaba.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/plural_form_of_certificate_of_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/bagolabebulixagajopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6728b53e-d0fb-4956-884a-ebbbbfc80a28/ripaletujajamubesemugufa.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/mailchimp_subscribe_form_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/1363191672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05c9e42f-7785-4fa4-ab1c-46b1687debf0/another_phrase_for_hiring_and_firing.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/58418078960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7958d38b-5f66-4514-b407-f563e6c6a07d/150cc_pit_bike_motorcycle.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/epileptiform_convulsion_meaning.pdfIn PDF document text
    • http://gurabagoderes.atwebpages.com/29262097133.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_off000108b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B6 5280 bytes
SHA-256: 77970b88af9d4a0632a50f3d011d382725a90567d190d3262bd10e69ca860a34
font_01_sfnt_off00011a94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A94 10208 bytes
SHA-256: 17c250a22a13729813ba44870c2741780da8e420091b854fe0953e0d9e10c23b

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