Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5e1c3407f83d169…

MALICIOUS

PDF

106.2 KB Created: 2021-06-04 04:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f9a39a3a9baf21580202ab9dca5caf5b SHA-1: 5ef10ec748bdb4221c3ef4252bbee6670071709e SHA-256: a5e1c3407f83d16966f391134d959a916696a2ec648936b8c2d19e1bf822593a
194 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The document body, though partially corrupted, contains a lure related to game mod installation, which is likely a pretext to encourage clicks on these malicious links. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://infrive.ru/pbw?utm_term=how+to+install+gta+5+mod+menu+ps4+online+no+jailbreak PDF link annotation
    • https://kalozepi.weebly.com/uploads/1/3/0/8/130814360/e29b022145e0c.pdfIn PDF document text
    • https://tenaxujapem.weebly.com/uploads/1/3/4/3/134341928/1798614.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414682/normal_5fc6840fdb1d2.pdfIn PDF document text
    • https://kujiguvasate.weebly.com/uploads/1/3/4/5/134584602/patorazosakaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419630/normal_5fdda71537eb0.pdfIn PDF document text
    • https://xarojitoma.weebly.com/uploads/1/3/5/3/135305856/fibonisotagumulaki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482617/normal_6064ec4eae944.pdfIn PDF document text
    • https://lisamotakix.weebly.com/uploads/1/3/4/3/134308999/4567686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467285/normal_601a7e0270e52.pdfIn PDF document text
    • https://dowozazufexu.weebly.com/uploads/1/3/4/6/134606261/rolofogimipu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449603/normal_5fd8602b9f9b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387567/normal_5fd82ffc96897.pdfIn PDF document text
    • https://xavozunop.weebly.com/uploads/1/3/4/3/134305705/roxeweniw_mamomup_duxoxumuwuga_lepuwidikabomid.pdfIn PDF document text
    • https://gikeviviku.weebly.com/uploads/1/3/4/7/134707445/6730144.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
    • https://uploads.strikinglycdn.com/files/c6f71f3c-b4db-4913-b8a5-cd0a1f17658a/katzun_lip_sync_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb1023fc-e653-40d2-b523-326e774a043e/kadobalepefife.pdfIn PDF document text
    • http://wikitaxif.pbworks.com/f/92043795206.pdfIn PDF document text
    • http://mogulazedub.pbworks.com/w/file/fetch/144526554/5248180756.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bf255cb-60fc-4d34-8c94-05edd65f617a/menim.pdfIn PDF document text
    • http://bukafag.pbworks.com/f/convert_whatsapp_audio_to_mp3_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6ffac9a-cbaf-4ffc-be3b-9a2dd47ed896/anatomy_and_physiology_coloring_workbook_12th_edition_answers_chapter_3.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECD 6440 bytes
SHA-256: 2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb
font_01_sfnt_off00012ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC2 5704 bytes
SHA-256: 745fcd7ed6a3b69f1b3852728bd2debe34c714bc85fd3f090598370c062fc581
font_02_sfnt_off0001421b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1421B 2344 bytes
SHA-256: b8e04332c9677abac35b615770ed5c5ce59a56c693dbafcf418b3602212d3833
font_03_sfnt_off00014c61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C61 12036 bytes
SHA-256: f4b458a92ef65dbd6fa77438f40ea50eadb8c24752b2a23560e4eb07924540f8
font_04_sfnt_off000175b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175B4 16256 bytes
SHA-256: c3e906cce4799db86b682b40de4462758fb0c01af838628d346f95745745e6c1
font_05_sfnt_off00018b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B30 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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