Malicious PDF — malware analysis report

Static analysis result for SHA-256 315c47477ab05338…

MALICIOUS

PDF

79.4 KB Created: 2021-04-26 19:23:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 70dce3367af70cf8dda1af8b9b7c7592 SHA-1: efae5efec666f94e0fcdb567663cab2210e30453 SHA-256: 315c47477ab05338a3535394a4ed4606e94d021f7a510f0b6f25741a46cf9fa8
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically pointing to a link farm designed to redirect users. The document body, though heavily obfuscated, appears to be a lure related to coffee machine comparisons, likely a pretext to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://leonvi.ru/strik?utm_term=which+lavazza+is+best+for+espresso PDF link annotation
    • http://trenolgia.buzz/kaxibixupanejopizocq72r.pdfIn PDF document text
    • http://ig-copyrightnotice.com/40289803755wk2x7.pdfIn PDF document text
    • http://community-day.ru/53650722416yf5e0.pdfIn PDF document text
    • http://requiredjokblog.com/zozanumixipowobalakagor2g8i.pdfIn PDF document text
    • http://shishkin-seed.xyz/56381193843zqczc.pdfIn PDF document text
    • http://femukujisidape.iblogger.org/wuvugaxasogefolefopiw.pdfIn PDF document text
    • http://kompledom.com/why_we_study_theory_of_computationh91ni.pdfIn PDF document text
    • http://edapog.online/netflix_android_apk_xda7tnlt.pdfIn PDF document text
    • http://fito4ka.xyz/human_anatomy_pro_apk_free8ts72.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://komadolosa.rf.gd/vezexox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5071e02-4211-4881-8b7b-830c814b333e/pizivujikebasapitut.pdfIn PDF document text
    • http://lupugavediroz.rf.gd/51592731735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8d56ee9-c179-430a-b162-3ea764776871/zezero.pdfIn PDF document text
    • http://jijazofar.rf.gd/sad_breakup_wallpaper_hd.pdfIn PDF document text
    • http://rerovoxuwalutew.epizy.com/dungeons_and_dragons_simple_melee_weapons.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/628bf32b-922c-4a42-9385-256ba973f351/william_faulkner_writing_style_a_rose_for_emily.pdfIn PDF document text
    • http://lepevalir.rf.gd/10375751282.pdfIn PDF document text
    • http://sanubexudo.rf.gd/sibovudipolafosoruzam.pdfIn PDF document text
    • http://tutivute.epizy.com/42257489822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8754c41-9e2e-447a-b628-17b30acb008d/game_of_life_cards_printable.pdfIn PDF document text
    • http://setedusatikami.epizy.com/31178740479.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05483035-44df-4029-bd9e-95984fda0f18/81904249253.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbb16378-1f11-493e-944c-39b69070894c/cloud_computing_biggest_companies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7212c568-f47a-4d75-af94-397f70d2e45d/8295940082.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_off0000e9d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D6 5048 bytes
SHA-256: 7e86de422c45475552315ba985f7167d278a94fe744c90bfff4d07b4b89f9959
font_01_sfnt_off0000fb1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1F 10968 bytes
SHA-256: a1dde12aaf7ec75de935a1d14d09761709edf40bb8956003af5d38b7a5f81ffe
font_02_sfnt_off00012059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12059 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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