Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f475410592bd140…

MALICIOUS

PDF

69.1 KB Created: 2021-04-27 23:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f879e0a56bbcfcddfa3315bd669ea4d4 SHA-1: af87bd759c278ef2c25b0bca6327405ec52d9054 SHA-256: 6f475410592bd1404dcc93d3e1ab7cb4b9563eb2f23b7b5e1978aa698a73b314
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in SEO link farms to manipulate search engine rankings or to redirect users to malicious sites. One prominent URL, 'https://bologen.ru/strik?utm_term=go+math+reteach+book+grade+5+answer+key', is flagged as suspicious. The presence of a large number of external links and the ML classifier's high confidence score indicate a malicious intent, likely phishing or redirection to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/strik?utm_term=go+math+reteach+book+grade+5+answer+key PDF link annotation
    • http://mapotilij.mygamesonline.org/international_business_the_challenges_of_globalization_free.pdfIn PDF document text
    • http://kelimap.mywebcommunity.org/wd_my_cloud_software.pdfIn PDF document text
    • http://tejasatobes.medianewsonline.com/kixijuwawomebirabajuweli.pdfIn PDF document text
    • http://fumuroruzej.medianewsonline.com/53652562570.pdfIn PDF document text
    • http://nijibegosovatiz.iblogger.org/select_city_walk_store_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/78020554465.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcc8eeac-1049-45e1-8462-dfbfa0d3ed24/deepak_chopra_seven_spiritual_laws_for_parents.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74cecacd-b597-46ef-bb72-1eac0bb489d5/befusujomovekalijawexiluf.pdfIn PDF document text
    • https://be9c8297-50e9-4ec8-be22-7cc4068ef96a.filesusr.com/ugd/fc3b0b_62a2c3448c4f4cabb19cffeb67e105e1.pdf?index=trueIn PDF document text
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_5d91454ae0b94a4399cb60d839fca99d.pdf?index=trueIn PDF document text
    • http://nojupaven.rf.gd/dynasty_warriors_4_items_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/gaziwasuna.pdfIn PDF document text
    • http://tudugir.atwebpages.com/tajopekudesux.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/panasurudibowufatogaduv.pdfIn PDF document text
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_58ac634db9c24803965367c6da7e1d50.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sisaxu/jejugugamuf.pdfIn PDF document text
    • http://dojopugoput.epizy.com/20517145206.pdfIn PDF document text
    • http://minetijixe.rf.gd/kikapifuj.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/86557819253.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/english_grammar_worksheets_for_class_3_cbse.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/kejakekozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1405767e-2032-4528-967c-a411684f7c17/how_to_measure_a_dog_for_a_waterproof_coat.pdfIn PDF document text
    • http://xukaneteris.epizy.com/apptoko_free_fire.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_off0000d185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD185 5872 bytes
SHA-256: 889b0d8073282cfa530d8ca6823940339d336d8fd8d2f35e0db6e3ddb7c9f397
font_01_sfnt_off0000e56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56F 9836 bytes
SHA-256: 94c1ed3776e4dfe53cc983a1bc1c2b20bea90fc9ee99347eb37de5e90f89c6ac

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