Malicious PDF — malware analysis report

Static analysis result for SHA-256 b57e5c7f116698ce…

MALICIOUS

PDF

80.6 KB Created: 2021-03-23 04:50:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b222de15b63389058137e27bdd4f1034 SHA-1: efa0615ccadcbdc6fbecf4a3c4ffcfe06fca1024 SHA-256: b57e5c7f116698cecbb3b8c99eee3023230b61ff088847061abde6e06e8ca6e1
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable hosting services and redirectors, indicating a link farm designed for SEO manipulation or phishing. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of numerous external links suggests the primary function is to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=metric+conversion+worksheet+pdf+with+answers In PDF document text
    • https://lugonejiborin.weebly.com/uploads/1/3/5/3/135336075/2157630.pdfIn PDF document text
    • https://vosovijuz.weebly.com/uploads/1/3/0/8/130813614/4203160.pdfIn PDF document text
    • https://rajexomogalifi.weebly.com/uploads/1/3/4/8/134891851/nojumo-wuzorijawi.pdfIn PDF document text
    • http://iwhite.space/64485828818chshn.pdfIn PDF document text
    • https://nererudufujodu.weebly.com/uploads/1/3/4/3/134321338/4974692.pdfIn PDF document text
    • http://jakufodunod.getenjoyment.net/25355428105.pdfIn PDF document text
    • http://findattime.com/88449252816kyd37.pdfIn PDF document text
    • http://hookup756.fun/what_is_the_purpose_of_laws_in_society33ghd.pdfIn PDF document text
    • http://ketosimple.online/why_wont_my_oven_workj4t2l.pdfIn PDF document text
    • http://xevojifixifepi.scienceontheweb.net/pusokodirikokasosiwuruw.pdfIn PDF document text
    • http://gamukanemafutu.mywebcommunity.org/38148493586.pdfIn PDF document text
    • http://orehi-siberian-force.online/how_to_take_apart_margaritaville_blendermtzs2.pdfIn PDF document text
    • http://mattelipsticks.site/botopedokixevasevonesaleenwsh.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://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_7e166ab7cc95494988bfef450a850723.pdf?index=trueIn PDF document text
    • https://315736c7-1030-4200-8d24-05c9f4951019.filesusr.com/ugd/d19ca0_797a1ac17b8740d3b68cf2435f821e80.pdf?index=trueIn PDF document text
    • https://1801fa0f-56e4-4894-8452-b8e06651d4be.filesusr.com/ugd/868401_f83c66aeea9a49b29a38bd4b1f78aafc.pdf?index=trueIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_874c93b628824e5a8f4f8a8f308cae04.pdf?index=trueIn PDF document text
    • https://3a5aa097-47f9-475f-9992-83bceef25cc3.filesusr.com/ugd/f55bec_6614880969ff4edd8580ca27c0450a20.pdf?index=trueIn PDF document text
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_0ec530d144de4487959c16ae56850591.pdf?index=trueIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_e9d94f08c97e4713ba9c37acdfe59998.pdf?index=trueIn PDF document text
    • https://7f3356c1-ec1f-498a-9d41-5b36c14d87b7.filesusr.com/ugd/98d33d_c955c3dee73f490d908330da0a73c913.pdf?index=trueIn 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_off0000ee68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE68 5220 bytes
SHA-256: d701e7d30423d8af754dbeec1b31f8b24c6269230aa173c24adc7fc6a440ca7f
font_01_sfnt_off0001003b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003B 10632 bytes
SHA-256: e82561014852122962d360905c6e3fe7a8d4598ce4fa4a149ab987de1dc349ca
font_02_sfnt_off000124c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C8 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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