Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c09b362ab0034b8…

MALICIOUS

PDF

82.8 KB Created: 2021-05-06 14:32:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 88bde9911f4ea5daf518459f2348a05d SHA-1: b0114abfc1d797df9a8b7f802426125e2f7f4d06 SHA-256: 1c09b362ab0034b8afb9ff0884182329e255eb8e7d1de598f70c28f0dc867c13
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 0.9998

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://nipisod.ru/strik?utm_term=what+is+indian+culture+food PDF link annotation
    • http://telunodet.22web.org/bafg_bayern_formblatt.pdfIn PDF document text
    • https://cdn.sqhk.co/vunalogivefu/noEAhAk/disable_bixby_android_pie_2019.pdfIn PDF document text
    • https://movediwifed.weebly.com/uploads/1/3/2/6/132695881/sejoter_dilajosez.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/66044405655.pdfIn PDF document text
    • https://cdn.sqhk.co/bumigorawi/ejifyzN/numopexadunoso.pdfIn PDF document text
    • https://cdn.sqhk.co/metajewamiva/hfUjjif/getafot.pdfIn PDF document text
    • https://cdn.sqhk.co/juwafajem/iwdMiag/life_simulator_3_apk_mod_download.pdfIn PDF document text
    • https://dibigisilob.weebly.com/uploads/1/3/1/6/131607467/gufunebukuwisagik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/118169be-759b-4951-b07b-7a53fa52ec4f/what_is_simple_operating_system.pdfIn PDF document text
    • https://aca56392-15ae-48e8-982c-fdf6c4ac0dc3.filesusr.com/ugd/00c070_9588d80aa4b14b82bade39181aab99c9.pdf?index=trueIn PDF document text
    • http://ritumogadoj.onlinewebshop.net/95445396603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77029bb2-d140-4555-9c87-fa91c5ed0255/10049353946.pdfIn PDF document text
    • http://rigirulame.epizy.com/bhai_tera_happy_birthday_song_ringtone.pdfIn PDF document text
    • https://6f81cef9-66a2-447d-9e1d-4c0427ef15c5.filesusr.com/ugd/4d935e_8ff9950e77dd471db8e562054d91db1a.pdf?index=trueIn PDF document text
    • http://rapodipowunifo.epizy.com/big_moe_s_diner_menu.pdfIn PDF document text
    • http://nujebij.onlinewebshop.net/80674210199.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8cd6ee9-7cbd-45d3-bc93-b5e7a8e77d5d/how_to_draw_blood_from_hand.pdfIn PDF document text
    • https://436240a4-ef10-404e-ad90-c5cab949c7af.filesusr.com/ugd/3fb742_b34c93af56854bcfa9e7b86ff8379d0a.pdf?index=trueIn PDF document text
    • http://bagesexepori.epizy.com/marlin_model_60_wood_stock_replacement.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB5 5124 bytes
SHA-256: dac00685ea54055067e7f4e8246c6d1c624e2a4e5ea21347cdd6c8dcd3ffc2f6
font_01_sfnt_off00010f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F23 10844 bytes
SHA-256: 7465e9950bfe0a592a9b71a4d7c3e55ac5fbaccb95fcebe936770f0647b55297
font_02_sfnt_off000133ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133FF 2476 bytes
SHA-256: 12afa13b4e4ff2e37f73cd228076fa50d358c01536818fe2c32042402f3d0800

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