Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba0be3bd084b0b33…

MALICIOUS

PDF

76.3 KB Created: 2021-03-12 07:55:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 37011aa1a2d25d0063bcd9e96bf88912 SHA-1: 26fb3d2028535a8e4798cde8d5d64c00725504cd SHA-256: ba0be3bd084b0b335c208886689b249335686ab4babdf0da5a89fa4fb0bd2e28
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The embedded URLs are likely used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://maypoin.ru/award?keyword=change+pdf+text+size+kindle PDF link annotation
    • http://gavediteriremuv.medianewsonline.com/referat_meningoencephalitis.pdfIn PDF document text
    • https://kisewosa.weebly.com/uploads/1/3/1/0/131070890/4009742.pdfIn PDF document text
    • https://tunomofezu.weebly.com/uploads/1/3/2/3/132303147/xawiku.pdfIn PDF document text
    • http://lixamewura.iblogger.org/81204715157.pdfIn PDF document text
    • https://vazewelekataba.weebly.com/uploads/1/3/1/6/131606588/b19bd43f3e370.pdfIn PDF document text
    • http://gosunenibunale.getenjoyment.net/37885652816.pdfIn PDF document text
    • https://zepareremuxox.weebly.com/uploads/1/3/4/7/134772384/3354443.pdfIn PDF document text
    • https://tapukupe.weebly.com/uploads/1/3/4/7/134717462/gemovu_zadowu_jifasupaba_lopuvofikadoso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://benogelepawes.rf.gd/24559762001.pdfIn PDF document text
    • https://c8d0f166-86fd-441b-8df5-aa5e6c6c7644.filesusr.com/ugd/f4b3af_a7cdd7f836d24ca7aba2b619d286adbf.pdf?index=trueIn PDF document text
    • http://pitaken.onlinewebshop.net/analog_to_digital_converter_ic.pdfIn PDF document text
    • https://5d3a3edc-1384-4eb0-a354-174dd54c13aa.filesusr.com/ugd/7f5dc5_3f8b3186ea2d4c3db609633ca4209287.pdf?index=trueIn PDF document text
    • http://naxokagad.epizy.com/miracle_box_crack_latest_2019.pdfIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_d6c180351e27450e8d5e71554eadf17e.pdf?index=trueIn PDF document text
    • https://74bb8966-1fc2-43cb-a641-24c20f380d28.filesusr.com/ugd/84c7b5_bf425cba8fda4dc08af43d11667795d9.pdf?index=trueIn PDF document text
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_3a472fb40abe42ebae0b76003ca8f957.pdf?index=trueIn PDF document text
    • http://fijukarevi.epizy.com/what_is_the_importance_of_self_introduction.pdfIn PDF document text
    • http://razikonuwivomo.epizy.com/mitisamusuruxiwuwilosoku.pdfIn PDF document text
    • http://bexalawisilinot.epizy.com/strategic_sport_marketing_4th_edition.pdfIn PDF document text
    • http://vumavoralamo.rf.gd/properties_of_exponents_practice_worksheet.pdfIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_1e684f7083234c0aa8d806c84e538beb.pdf?index=trueIn PDF document text
    • http://mesujitoz.epizy.com/interior_angle_sum_worksheet.pdfIn PDF document text
    • https://855e1e5b-0daf-4dce-aa73-dfad2bfec5df.filesusr.com/ugd/ced2dc_a562b01e0b6847d1ae642c918a783750.pdf?index=trueIn PDF document text
    • http://dekidad.epizy.com/ae_form_55-_46a_checklist.pdfIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_3ba4647cccc2401799dea7e3662783e8.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED95 5296 bytes
SHA-256: 7fd4fc6850db3d34f451eb378cfc8f9e4b4f5eaf1fa6a2cf19699b24fbe8e57e
font_01_sfnt_off0000ffa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA9 10520 bytes
SHA-256: 2abc7363dbc682a8bd9e08f3a78237be0f0be7faf72129de29a78a9faacb807b

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