Malicious PDF — malware analysis report

Static analysis result for SHA-256 1899a921f12ae149…

MALICIOUS

PDF

40.6 KB Created: 2020-11-01 10:24:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 470c90d22947bb38b648ab1b2cf65414 SHA-1: 303b6fa51cf633978a303375d01ca072797e01f6 SHA-256: 1899a921f12ae149d24ce087cc702395fbfff679863151e55e604bd3e87ce062
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with the primary link identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a service manual, which is likely a lure to encourage clicks. The presence of a link farm further indicates a malicious intent to distribute or redirect to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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
  • 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://ttraff.ru/123?keyword=mack+truck+service+manual+pdf In PDF document text
    • https://fidurelofomus.weebly.com/uploads/1/3/0/7/130740547/37d346d9.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/sodivemojusamele.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/bernard_marr_data_strategy.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/taj_mahal_information_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/mobuzobafujekariseduranan.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/88616255368.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/el_camino_del_artista_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7418db5a-3ae2-4e30-aff6-ffb7a116a87c/ascii_code_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/kubataserev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6238/1729/files/what_does_mcca_assessment_recoupment_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/el_espiritu_del_capitalismo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/2968/1071/files/street_fighter_ex_apk_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/14647557652.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/unwto_world_tourism_barometer_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/19003240476.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/max_weber_and_transactional_leadership.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_off0000618e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618E 5428 bytes
SHA-256: ef0a0994a7c6ea3a1a4c20c8e6cd95f670f0ebe088e98a987ab7beb4b06f1e87
font_01_sfnt_off00007405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7405 9872 bytes
SHA-256: 88cba4364728e65655ac6aab76eefc2544e18a175dc31de57496dadc026fdaf5

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