Malicious PDF — malware analysis report

Static analysis result for SHA-256 2341cf7f045df9b2…

MALICIOUS

PDF

84.2 KB Created: 2021-05-10 03:14:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 00d61f8dfe1a2f6bcde07a25b35b9ef9 SHA-1: bceebb40e4f573a412eff5e19366c887366e1ffb SHA-256: 2341cf7f045df9b2f6d82aa7b1f899ce499c1ddbac47f3fe8e0e38330a2db23b
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. Although no scripts were extracted, the presence of many URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' point towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://boxudeso.weebly.com/uploads/1/3/4/3/134320939/4734532.pdf In PDF document text
    • http://xaraxag.mypressonline.com/action_verbs_list.pdfIn PDF document text
    • http://hook-up.fun/sutaninesezatoruzanodejqjg5q.pdfIn PDF document text
    • http://xisumagogali.getenjoyment.net/firer.pdfIn PDF document text
    • http://artistichomesolutions.com/icu_intern_survival_guide1hwis.pdfIn PDF document text
    • http://fozogadixanemo.iblogger.org/sagikozonedefugafurogife.pdfIn PDF document text
    • https://lufisadoxusixa.weebly.com/uploads/1/3/4/5/134583632/9315384.pdfIn PDF document text
    • http://tophomework.space/youtube_pencilmation_hat_song0le81.pdfIn PDF document text
    • http://jafixane.iblogger.org/47225262956.pdfIn PDF document text
    • https://pogixadajunoje.weebly.com/uploads/1/3/4/6/134661749/4144507.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/nanocellulose_technology_applications_and_markets.pdfIn PDF document text
    • http://jaxopofo.22web.org/benedict_anderson_nationalism.pdfIn PDF document text
    • https://pavexoseg.weebly.com/uploads/1/3/5/3/135315086/3452960.pdfIn PDF document text
    • https://moremutinujiti.weebly.com/uploads/1/3/4/8/134865562/jijewe.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
    • http://feedproxy.google.com/~r/wb/ENAH/~3/mO-5lVq97NI/wb?keyword=how%20do%20i%20fix%20my%20vizio%20tv%20from%20freezingPDF link annotation
    • http://josejutolaxof.rf.gd/david_benatar_the_human_predicament.pdfIn PDF document text
    • http://mavowidigusuj.rf.gd/fiwujamurisiso.pdfIn PDF document text
    • http://vewokepewaki.epizy.com/59713805927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30f98c4b-39d6-4743-b07c-0bea6ff71730/bovorudezolevujudowumumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dc249e7-2ebf-4b00-9e04-08788f75adb3/jewaxomirifafologafesiko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f6025fc-d911-40e1-b4b9-6cdea20dfb23/john_deere_345_any_good.pdfIn PDF document text
    • http://semiwexojexudu.epizy.com/arcore_android_phones.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_off0000fe98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE98 4928 bytes
SHA-256: 0c156e2b626d744bae1af3abdd1c4b4f7dbe6ec694dd5e35e04cf58cf50ee08b
font_01_sfnt_off00010f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F67 11000 bytes
SHA-256: 27bcdef45c1d874544e907b769ed8f3352bd179a3bc8fc4d62e8043857554447
font_02_sfnt_off00013534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13534 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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