Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6518bd8211e67cc…

MALICIOUS

PDF

93.9 KB Created: 2021-06-09 03:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7e93eb7017dbf99e660d3da2085c0b2 SHA-1: dfedd03ffe4c64144f9d745934f59c4be00b4151 SHA-256: a6518bd8211e67ccf0999a777f249068c8cd08580e11d6566f12bac97d29f2d6
226 Risk Score

Malware Insights

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

This PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content. The presence of a lure for a game hack and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and link farm behavior are indicative of techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://chcial.ru/pbw?utm_term=dream+league+soccer+20+hack
    • https://kepijifawobi.weebly.com/uploads/1/3/5/3/135388201/1505795.pdf
    • https://nipefewemaxu.weebly.com/uploads/1/3/4/3/134387654/ratumutukofidew.pdf
    • https://fixaporaxaju.weebly.com/uploads/1/3/1/4/131413905/9442076.pdf
    • https://sutivekawexebe.weebly.com/uploads/1/3/1/6/131636655/959974.pdf
    • https://static.s123-cdn-static.com/uploads/4386349/normal_5fcfa3235ff20.pdf
    • https://xesizoge.weebly.com/uploads/1/3/1/4/131452949/f4560363cea.pdf
    • https://jajaleregonu.weebly.com/uploads/1/3/4/2/134235513/7537955.pdf
    • https://static.s123-cdn-static.com/uploads/4419204/normal_600379c68f4fa.pdf
    • https://gininigexaviw.weebly.com/uploads/1/3/5/3/135350692/daseb-zunuporisa.pdf
    • https://cdn-cms.f-static.net/uploads/4489028/normal_605f3b3c39bbd.pdf
    • https://static.s123-cdn-static-d.com/uploads/4372721/normal_60b1efdfa24d0.pdf
    • https://movudari.weebly.com/uploads/1/3/1/0/131070737/rakar.pdf
    • https://static.s123-cdn-static.com/uploads/4369765/normal_5fc674e89e56b.pdf
    • https://pudawiwut.weebly.com/uploads/1/3/5/3/135342926/2887297.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://guronavageba.pbworks.com/f/present_simple_vs_present_continuous_reading_comprehension_multiple_choice.pdf
    • http://molosafokaji.pbworks.com/f/sa_salim_2_sil_batan_full_indir.pdf
    • http://fevuxowina.pbworks.com/w/file/fetch/144576429/belojelumibizomevibojox.pdf
    • http://zubipuwaf.pbworks.com/w/file/fetch/144837672/how_to_operate_a_beko_oven.pdf
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f23.bin
e368327efaa4427bd4ef429580006e456fc09250ea0a1ce8c75606d44ab5e298		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F23 5548 bytes
font_01_sfnt_off000121d9.bin
fe2123dbee4b7bf8755342d2f8fb97f76f6a70077f8b9fc3a8343a1737165214		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121D9 2528 bytes
font_02_sfnt_off00012d0a.bin
fe6147cbd85c7332548cc4cd418c68520132107c7752fdb7884ef9c992ae5d59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0A 11808 bytes
font_03_sfnt_off00015410.bin
f267a97a42ed964490c0c36cf8d24d30f5cfc386ee24850e75bb3a4991f11828		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15410 16376 bytes

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