Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7ec4cfc4adfce06…

MALICIOUS

PDF

65.5 KB Created: 2021-02-13 02:34:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ee13d3b488486ca921fad1ad8d8042c8 SHA-1: cd8964f47c9aeaaa13ae02e0eb64338f5b7aff72 SHA-256: a7ec4cfc4adfce06283211474c8a92ae21844d5e82af5a10d2e69d607e39212e
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on disposable domains and appear to be part of a link farm. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a strong likelihood of this document being used to redirect users to malicious websites. The ML classifier and ClamAV detection further support its malicious nature, classifying it as a phishing or trojan PDF.

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://jottigo.ru/123?utm_term=taranis+q+x7%252Fs+opentx+user+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/putuziboki/jxijjgm/zupokogeladixijipipefowo.pdfIn PDF document text
    • https://cdn.sqhk.co/rubovadu/ghTrEnM/73618825992.pdfIn PDF document text
    • https://cdn.sqhk.co/joxipadij/ghNejfU/98020105103.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/iihbkhe/spongebob_sponge_on_the_run_movie_free_online.pdfIn PDF document text
    • http://iciko.xyz/online_calendar_template_2020lujod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490127/normal_6011882dee654.pdfIn PDF document text
    • https://cdn.sqhk.co/suxupijisajo/cKICidh/fuvip.pdfIn PDF document text
    • https://cdn.sqhk.co/zisujidixa/RLYvKic/64404027602.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479705/normal_5fd03431b213b.pdfIn PDF document text
    • http://how2clever.com/40965093723n0sr.pdfIn PDF document text
    • http://hushseo.online/77462887567im0np.pdfIn PDF document text
    • https://fisadurubimu.weebly.com/uploads/1/3/1/4/131409264/4d83c7d95.pdfIn PDF document text
    • http://1ux.site/crying_eyes_meme_templatetanpf.pdfIn PDF document text
    • http://atomyimperial.ru/vmware_player_freecklox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413564/normal_600cc90f8182c.pdfIn PDF document text
    • https://cdn.sqhk.co/zimajigon/fhHDPr9/verizon_messages_sign_in.pdfIn PDF document text
    • http://ses-paypal.com/dapikaximxm54i.pdfIn PDF document text
    • http://generalmassage.online/ac3_audio_mx_player_androidchufe.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwipabobatu/jhgbgjK/9620997208.pdfIn PDF document text
    • http://zoomita.fun/notazutujum32i6h.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3FC 5448 bytes
SHA-256: 4290b837994f67d35ef7e7866086ddb016d4032d78c0fd382cc1952f0078eede
font_01_sfnt_off0000d680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD680 9864 bytes
SHA-256: 3c166626a76f1962806fa6bc84e614ddbf756bbd6ce36410606a9a4700197cb5

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