Malicious PDF — malware analysis report

Static analysis result for SHA-256 e63b51e8803ccc97…

MALICIOUS

PDF

66.7 KB Created: 2021-03-04 06:39:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 667caba15c17ab7f12c33855b3f2a062 SHA-1: c46349991a5f1b8861a985f7bf1aecf3b7fea6c1 SHA-256: e63b51e8803ccc975dc3a26b25116509f06b43a0980f37fb03776605bf25cdcd
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm, with the primary URL being 'https://jumiwimov.ru/wb?keyword=al%20estar%20en%20la%20presencia%20de%20tu%20divinidad%20marcos%20witt'. This behavior, combined with ClamAV detection as 'Pdf.Phishing.Trojan', strongly suggests a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/wb?keyword=al%20estar%20en%20la%20presencia%20de%20tu%20divinidad%20marcos%20witt PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4488135/normal_5fcf3ebb404c3.pdfIn PDF document text
    • http://guzexesuge.mypressonline.com/logitech_k360_wireless_keyboard_function_keys.pdfIn PDF document text
    • https://zezebeburopixem.weebly.com/uploads/1/3/5/3/135326834/kewuzegujilo.pdfIn PDF document text
    • https://pewukuma.weebly.com/uploads/1/3/4/7/134762228/e09294644.pdfIn PDF document text
    • https://fuxugikitoze.weebly.com/uploads/1/3/1/0/131070560/9900132.pdfIn PDF document text
    • https://jolezutixuzusav.weebly.com/uploads/1/3/4/6/134605000/dukujikajexoreb_giteri_novuwemuwu.pdfIn PDF document text
    • https://zumavoga.weebly.com/uploads/1/3/1/3/131383266/xopaleb_jamuj.pdfIn PDF document text
    • http://zevewidojodot.mywebcommunity.org/edenpure_gen3_model_a3705_parts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466675/normal_6033a7323d5ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457296/normal_6039b71814840.pdfIn PDF document text
    • http://xikimifo.66ghz.com/lelenokotujape.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/mixanaz/adjusted_r_squared_meaning.pdfIn PDF document text
    • http://rabelinowizufe.myartsonline.com/libro_los_nuevos_profesionales_del_siglo_xxi.pdfIn PDF document text
    • http://tuwutexo.onlinewebshop.net/bontrager_trip_300_cycle_computer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/margaritaville_concoction_maker_key_west.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/ilo_smart_tv_55_manual.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_off0000cb33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB33 5360 bytes
SHA-256: db65686f0af2d0707784fc8f64e234ab4edbaff7333720dc599c7bb73a6e8b54
font_01_sfnt_off0000dd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6D 9488 bytes
SHA-256: a3091952a40ce1ff85cc48a947b601a1337a8c7d0d065a0c5babe8584d588234

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