Malicious PDF — malware analysis report

Static analysis result for SHA-256 30daea96f1233122…

MALICIOUS

PDF

76.1 KB Created: 2021-03-30 19:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1660985c95291b86649b9f6f843ae67c SHA-1: 9fa311674503a0390fd30959d50c92ea5dc05eb3 SHA-256: 30daea96f1233122f0c60ac520324011a654ab9eb54b5eb2e648c1599b09d3de
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9998

Heuristics 5

  • 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 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://crophysi.ru/wix?keyword=imvu+apk+unlimited+credits+download PDF link annotation
    • https://jenodefutufute.weebly.com/uploads/1/3/4/3/134373351/9706bc5.pdfIn PDF document text
    • http://xokezuwadem.mygamesonline.org/black_caps_schedule.pdfIn PDF document text
    • https://pakedarisibibo.weebly.com/uploads/1/3/4/5/134501134/f2639.pdfIn PDF document text
    • http://wusumomijo.medianewsonline.com/atlantean_language.pdfIn PDF document text
    • https://lanasasaf.weebly.com/uploads/1/3/0/8/130815311/5223de911b.pdfIn PDF document text
    • https://gudabujazoz.weebly.com/uploads/1/3/0/7/130739385/852efb923.pdfIn PDF document text
    • https://rofoxanubojinud.weebly.com/uploads/1/3/2/7/132740779/wuboguridudamir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tutazena.epizy.com/lozuwudubexapotufinib.pdfIn PDF document text
    • http://sefudupufojuxo.rf.gd/72408478471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1ca699c-2996-4088-9b6e-93a8e04f4c12/ruwakudoxasajatexizikoku.pdfIn PDF document text
    • http://biwosagamivi.myartsonline.com/aphasia_classification.pdfIn PDF document text
    • http://jufosuliz.epizy.com/amma_sentiment_tamil_movie_songs_free.pdfIn PDF document text
    • http://mewuxugeje.epizy.com/arctic_wind_portable_air_conditioner_10000_btu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00b73ea2-a1bb-4881-9256-95ca40464b0a/51413307767.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/440ea398-4e4b-4404-b4e5-e9e7ca0a6389/41649968732.pdfIn PDF document text
    • http://ragomoxos.rf.gd/60407799549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db9edd10-46e2-4478-9558-31608fd3f86c/vipibozejuloxonevijadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb93e840-fd32-4381-b71c-2c5d3b3e3f21/north_carolina_dmv_permit_practice_test.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_off0000ec32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC32 5372 bytes
SHA-256: 52ba150133349ab56264c3ce3f4404c9de4c80760b05a08b4726b70b3c3c7063
font_01_sfnt_off0000fe75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE75 10768 bytes
SHA-256: c4bc05da0fb4ad2e16592947809255f0f9e0ae7f469657fd54455b84209fa8f0