Malicious PDF — malware analysis report

Static analysis result for SHA-256 200179cfd6cf0424…

MALICIOUS

PDF

78.2 KB Created: 2021-03-25 05:10:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 2fbbbcc0eb62edb32fac56eda7157696 SHA-1: ebf75eb376e6dd5655ffedd9488b9b2826653d59 SHA-256: 200179cfd6cf04242a44fde9c2fbb5a0465faf859ecbf4c9c32bdf7aea3524d2
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, embedding a large number of external URLs, many of which are hosted on disposable domains. The primary URL, 'https://pelibifir.ru/strik?utm_term=what+is+the+most+hated+personality+type', suggests a phishing or scam attempt disguised as content related to personality types. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://pelibifir.ru/strik?utm_term=what+is+the+most+hated+personality+type PDF link annotation
    • https://silajawa.weebly.com/uploads/1/3/4/3/134339193/gekig.pdfIn PDF document text
    • http://tojasojula.iblogger.org/27098712032.pdfIn PDF document text
    • http://sozetil.66ghz.com/sequences_of_transformations_worksheet_answers.pdfIn PDF document text
    • https://wisukasef.weebly.com/uploads/1/3/1/4/131453855/a770c944d.pdfIn PDF document text
    • https://walupufodurutos.weebly.com/uploads/1/3/4/7/134734499/3ab450f05d94.pdfIn PDF document text
    • https://nubavusixid.weebly.com/uploads/1/3/5/3/135348304/6123861.pdfIn PDF document text
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/buloxil.pdfIn PDF document text
    • https://wovibebufofe.weebly.com/uploads/1/3/4/0/134041471/xeweposumojebevozov.pdfIn PDF document text
    • https://nulebuset.weebly.com/uploads/1/3/1/4/131411431/lizurazejeje.pdfIn PDF document text
    • https://vobasonuniba.weebly.com/uploads/1/3/4/6/134668907/mivajeb-melulasokomawu-bufiwariza-lisudofas.pdfIn PDF document text
    • https://sezitoxonuga.weebly.com/uploads/1/3/4/8/134886233/tigakorumaxu.pdfIn PDF document text
    • https://jujamepusa.weebly.com/uploads/1/3/2/8/132815903/728cad5d8238de.pdfIn PDF document text
    • https://nelubetif.weebly.com/uploads/1/3/5/3/135322580/bopup-miruw-misov-gaxobeki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/762620a4-11c3-421e-a15b-b4510417da39/vopopaxepikavus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b8d5162-db5a-432a-9b3d-934f36fcb2a5/how_to_read_the_stock_market_charts_in_the_newspaper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06957fe2-912b-42e7-8cfa-06cd6ced2674/29500444296.pdfIn PDF document text
    • http://dofagefa.epizy.com/7358358563.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b41f9bd-4abc-48a4-a363-b8c616228389/new_holland_tc30_parts.pdfIn PDF document text
    • https://dc6b22d1-fd3c-476a-b8f1-b0505981f591.filesusr.com/ugd/ab5adf_9da3085f207c472a995b07e95a9cb06f.pdf?index=trueIn PDF document text
    • https://fc060a1e-8c1d-4b7d-bafd-75f79d4c6355.filesusr.com/ugd/c0a468_ac5caa8a568c455bae9cd16b5921c5e7.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BE 5312 bytes
SHA-256: 48bf70d90ff91f1b169c509861a89ac02a6ba497bdfdaafcb93be81219cfde72
font_01_sfnt_off000105b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B3 10672 bytes
SHA-256: 7d3c9fb1913eca3d559ff875dc93c2e35c4034eb679e530c70adcf952f78eb25