Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ebba1ef78faa4a…

MALICIOUS

PDF

71.8 KB Created: 2021-01-15 04:09:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 5f8dec3c1ca43c19bf02fb502c6474f3 SHA-1: 9c984dd4eec4249a945924ad9e532c97837df6ad SHA-256: 22ebba1ef78faa4ab80f035f7df457ad7387d2a3e4dbd9799b2c6b916c6b8201
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a link farm with numerous URLs, including a known malicious redirector at 'traffking.ru', and many links hosted on disposable domains like 'weebly.com' and 'mozfiles.com'. The document body is heavily obfuscated and appears to be junk data, suggesting the primary purpose is to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffking.ru/123?utm_term=kitchenaid+9+cup+food+processor+kfp0919cu In PDF document text
    • https://nipifofopofeduv.weebly.com/uploads/1/3/4/3/134338269/fagak-sesixawur-sozosexoliz.pdfIn PDF document text
    • https://site-1178548.mozfiles.com/files/1178548/jajizibejubap.pdfIn PDF document text
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/saroxugufa-gibax-padosidoxole-xuxero.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450045/normal_5fa55669c9fde.pdfIn PDF document text
    • https://site-1175725.mozfiles.com/files/1175725/87594312044.pdfIn PDF document text
    • https://dawokopo.weebly.com/uploads/1/3/5/3/135314789/jemewatixug_rifitam_wadelasaneniwov.pdfIn PDF document text
    • https://site-1181037.mozfiles.com/files/1181037/real_drum_games_apps.pdfIn PDF document text
    • https://site-1196438.mozfiles.com/files/1196438/mexubuluwe.pdfIn PDF document text
    • https://xafixefar.weebly.com/uploads/1/3/4/7/134714422/wepavegafetazokafa.pdfIn PDF document text
    • https://zemabata.weebly.com/uploads/1/3/4/6/134677216/4e0de5dfe24cb1.pdfIn PDF document text
    • https://site-1166680.mozfiles.com/files/1166680/inotia_4_mod_apk_no_high_damage.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366017/normal_5fc5515009faf.pdfIn PDF document text
    • https://fazulozuxili.weebly.com/uploads/1/3/4/6/134625369/rekuvu-wegomu-latevaxadobojap-likasadaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fajujiju/cain_abel_oxid.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0F 5596 bytes
SHA-256: 2e1558b16bcd1531881c24c83365f352b2b209e60dec277f49dad02dd32afedf
font_01_sfnt_off0000ed14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED14 11076 bytes
SHA-256: 8bc3936df13d33e2f74b876c21663b866bff8e4c9a95f1fc89d528d4fdce4eac

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