Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b7332a5c9dfb40b…

MALICIOUS

PDF

83.3 KB Created: 2021-03-31 17:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4d7648e515afa13dbdf9f060bebb87c SHA-1: 5099207dd989a8a6837f69ad51f4fe71833e6bce SHA-256: 1b7332a5c9dfb40b5aaa6db82733ae7ea1cf31e4ae0b7c1057b7486d771b8056
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm designed to redirect users to malicious content, potentially for malware distribution or phishing. The presence of a URL related to 'apk free download' further suggests a lure for malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=lifeline+flatline+apk+free+download
    • https://cdn.sqhk.co/tedavevata/1gfKyjc/wojeroluxuvonuvaboz.pdf
    • https://cdn.sqhk.co/navotezive/j4i5igV/the_culture_code_book.pdf
    • https://cdn.sqhk.co/xevowuto/JW9djd1/69705820765.pdf
    • http://lisilagitani.22web.org/14491878114.pdf
    • https://cdn.sqhk.co/ladesajisama/1fjegi0/22784720433.pdf
    • https://cdn.sqhk.co/niramojiga/jbxw7je/32196631247.pdf
    • https://cdn.sqhk.co/wogirujut/sBjjgjc/usa_today_sports_images_recent.pdf
    • http://wazasoku.iblogger.org/activity_series_chemistry.pdf
    • https://cdn.sqhk.co/kefivaxepaj/ijx7Mgc/acrylic_nails_natural_color.pdf
    • https://cdn.sqhk.co/bevizewo/itZiijh/tap_tap_tap_clean_tiktok.pdf
    • https://cdn.sqhk.co/jigavozef/Zjbnid3/67775853929.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rovuweraja/fisegupuroporexex.pdf
    • https://s3.amazonaws.com/tuzakifezara/97862515010.pdf
    • https://6bc61794-ec17-45f1-96eb-8bed4cd57308.filesusr.com/ugd/217b8a_bd3ba64e78bc42ce8967aa98961e2371.pdf?index=true
    • https://6f84c080-6bd2-4154-8ce1-0e390380bda5.filesusr.com/ugd/defdb4_4415c6d184bd411faacdcef9b7476e3c.pdf?index=true
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_d6cc8db275764361b980e1ad7675fa18.pdf?index=true
    • http://lebevinawefebo.rf.gd/excel_macro_copy_paste_values_all_sheets.pdf
    • https://s3.amazonaws.com/kovibu/68594967216.pdf
    • https://s3.amazonaws.com/vobuturinivi/78428008430.pdf
    • https://s3.amazonaws.com/dudujopixejikug/15121662763.pdf
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_2016a145ed07424d89f87d602a4b961f.pdf?index=true
    • https://5e024257-ca51-40df-b6b5-a3104c7b7124.filesusr.com/ugd/97368a_81fbd14cd73a4a43ac7822c3a7cddaa2.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108f4.bin
1f335c2c70b77f7a397d78a056599b26e405ab6745435de3f3ae01b3aa153498		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108F4 4956 bytes
font_01_sfnt_off000119fa.bin
d0d60259d5f9774fecf3e2f4430544d84fd606bb46923654d7b3f4d4f7203185		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119FA 11040 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.