Malicious PDF — malware analysis report

Static analysis result for SHA-256 a084a001a8147c2d…

MALICIOUS

PDF

75.0 KB Created: 2021-03-19 14:01:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bda599cfa557bc12b4e167cae0550313 SHA-1: 101abaf53cf8e84bbee952ebd86ef0aac717d3bb SHA-256: a084a001a8147c2da6ad2cb9ec12d75d9075eb2ee1a713f80b0e3f0e7eaeac0b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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://soxebez.ru/wix?keyword=storm+cat+generator+spark+plug PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4493209/normal_60352a3c130f5.pdfIn PDF document text
    • http://nivolabilifap.iblogger.org/whats_the_difference_between_a_12v_and_20v_drill.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371265/normal_600fa65475b55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460465/normal_602a79ca54343.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/fihYN5n/blade_warrior_3d_action_rpg.pdfIn PDF document text
    • http://kudopifupelixi.22web.org/gufobebukikuvuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412775/normal_5fd1c3cf5e70a.pdfIn PDF document text
    • http://xuforaxi.22web.org/ximovobawolikuzafikasu.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/hdhiwhc/najolizuvubifusazokewewik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dojeranorered.epizy.com/77811555480.pdfIn PDF document text
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_ac0d94839c184ea1a336db29f13cd05d.pdf?index=trueIn PDF document text
    • https://ce55c564-0e79-48ac-bd91-a034cff8554b.filesusr.com/ugd/bd1fc0_34d2f69b8d3b439eb4af7036782b931b.pdf?index=trueIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_3fae0bebd97f448a9ce4b516abea715f.pdf?index=trueIn PDF document text
    • http://vujomafo.epizy.com/how_to_use_ikea_oven.pdfIn PDF document text
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_2b89fbcbfe914c6691396868e05da149.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tobaziw/newesuwivusosi.pdfIn PDF document text
    • https://02314edc-d025-420b-9d62-795437f25c47.filesusr.com/ugd/4f0fc1_b25354f5116c46dfaafdd9a22173cfa3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/lozanarefixatibonamiwawa.pdfIn PDF document text
    • http://jenenulufem.rf.gd/in_what_order_should_i_watch_sao.pdfIn PDF document text
    • http://zoxumatodemake.rf.gd/rutijotazuzadubifamegin.pdfIn PDF document text
    • http://wikatamuk.rf.gd/teoria_del_realismo_juridico.pdfIn PDF document text
    • http://lufafutogixafu.rf.gd/most_unique_city_names_in_the_world.pdfIn PDF document text
    • http://rowagaparik.rf.gd/18945583943.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_off0000e7ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AB 5420 bytes
SHA-256: 0bd2f0a04409217041b4fae1934a9d595329e6d3f737e64dc05f817782e56c1e
font_01_sfnt_off0000fa08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA08 10736 bytes
SHA-256: f122ea1adcc41fe5b8ec689f0eb560d0bdee60692524867d60d26b59fac7ad73

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