Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bbb2e46bdc0854c…

MALICIOUS

PDF

86.6 KB Created: 2021-03-10 16:44:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3c4c2efe5a8f5d261c101b9421f7e14f SHA-1: c7584a080181e89cc40b14ce5c8f85b2e3fabc95 SHA-256: 6bbb2e46bdc0854c8657df26baae1cf89f7d562969e83774ed9defd7585e069d
206 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a QR-code lure. 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 0.9996

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://jacksth.ru/123?utm_term=photomath+camera+calculator+app PDF link annotation
    • http://vonexalux.sportsontheweb.net/mavikugowale.pdfIn PDF document text
    • https://pivokobofu.weebly.com/uploads/1/3/4/6/134648089/razubipi.pdfIn PDF document text
    • https://fezuwarojeti.weebly.com/uploads/1/3/1/3/131383544/0b04cb0f.pdfIn PDF document text
    • http://rosutob.getenjoyment.net/bersa_thunder_380_pocket_holster.pdfIn PDF document text
    • https://polatubogo.weebly.com/uploads/1/3/4/5/134598163/gepilipapo.pdfIn PDF document text
    • http://robugipunebib.mygamesonline.org/what_is_the_hardest_part_about_skydiving_joke.pdfIn PDF document text
    • https://luzulobopado.weebly.com/uploads/1/3/2/6/132681737/fusonigetedifi.pdfIn PDF document text
    • https://kuritemu.weebly.com/uploads/1/3/1/3/131383398/rofofaj_kalugifotoj_xewile_rizatilusu.pdfIn PDF document text
    • https://zulevoto.weebly.com/uploads/1/3/2/6/132696122/7920963.pdfIn PDF document text
    • https://keboxineb.weebly.com/uploads/1/3/0/9/130969034/247963.pdfIn PDF document text
    • https://wewiruvikaju.weebly.com/uploads/1/3/0/7/130775929/20d3e0fedc.pdfIn PDF document text
    • https://rerupogom.weebly.com/uploads/1/3/0/8/130874691/rujevujenawe.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://uploads.strikinglycdn.com/files/6bb0b35b-96da-4f97-82ef-3901406a812d/nuance_power_advanced_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ba83bba-2697-48da-b01d-28dea7333480/can_you_break_the_lease_due_to_covid_19.pdfIn PDF document text
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_ab783059a7cd40188f54773314ad8796.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dorulusof/76658511394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cea0ce88-3420-470a-a311-c571ee939a99/m_audio_fast_track_ultra_drivers_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20a0671c-4cb0-465b-8441-d9ae7fcbfd43/19524130050.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/guide_for_temple_run_2_oyna.pdfIn PDF document text
    • https://a3720f92-bdaa-4449-a3ff-14f36884d2d5.filesusr.com/ugd/afadc3_0825cad8a2214a6b950243d897a05e31.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/70f384a9-c36f-4b42-8797-30d1bc5e8ca9/who_is_the_narrator_in_barn_burning.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10996 4724 bytes
SHA-256: 2e6e42451693145b903a84d2044b4460ba2f8a559e8771bd20144ee03e3b7b4e
font_01_sfnt_off0001199e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1199E 10940 bytes
SHA-256: bcc0ff84d90afcc7ff9c69758580c454f527d4131b4dc4deb751d3c3e970c075
font_02_sfnt_off00013ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EF1 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71