Malicious PDF — malware analysis report

Static analysis result for SHA-256 45b7e9eada8a8051…

MALICIOUS

PDF

71.7 KB Created: 2021-02-18 21:00:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: f3336f7dac0e5710e882531bccca5c54 SHA-1: 5dcb5e0ba5e42591369ca26508cf489b0a690ad9 SHA-256: 45b7e9eada8a805117d72204d2e08942deb43dda03cb03ff4ba899b0af9cb158
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to 'how to program remote start fob', which is likely a pretext to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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/strik?utm_term=how+to+program+remote+start+fob In PDF document text
    • https://cdn.sqhk.co/dusaradezat/iLjhZe8/torivatavunirik.pdfIn PDF document text
    • http://momsmall.space/calculus_and_its_applications_13th_eg63p9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459036/normal_5fe5cfa291155.pdfIn PDF document text
    • http://goloszauniver.fun/farming_simulator_19_cotton_guideyr85s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458145/normal_60114509c6beb.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/jaiajdc/tower_defense_cursed_treasure_4.pdfIn PDF document text
    • https://cdn.sqhk.co/gipagigo/bNzpjhr/13084849568.pdfIn PDF document text
    • https://lufalejovi.weebly.com/uploads/1/3/1/3/131380058/aa6764.pdfIn PDF document text
    • https://jabibodusap.weebly.com/uploads/1/3/2/6/132681053/81f4306ab9c64.pdfIn PDF document text
    • http://sweetygirl.club/18309348842oadyt.pdfIn PDF document text
    • https://xefolulewonud.weebly.com/uploads/1/3/1/4/131406676/lemupinug.pdfIn PDF document text
    • http://clyb-wylcan3.space/wukonoxosakoxuwryylf.pdfIn PDF document text
    • https://moxuronanupew.weebly.com/uploads/1/3/4/5/134597487/nubusilumo.pdfIn PDF document text
    • https://rowiteruna.weebly.com/uploads/1/3/4/4/134470704/patomojaxa_sikebojanazara_bezaselapumiwa.pdfIn PDF document text
    • https://cdn.sqhk.co/mapelimujeku/1gfjbji/zivigozivisuku.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/zalomi/jaspersoft_ireport_5._6._0.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/upsc_rt_exam_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/how_to_find_the_mass_of_an_element_in_a_compound.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/ussr_anthem_ringtone_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/template_website_responsive_bootstrap.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/airdots_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/house_rental_agreement_format_in_tamil_nadu.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_off0000dc13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC13 5380 bytes
SHA-256: 7a2d36911178ebbf6a33935d1fed7f1fd2cc4351d0ccc74b7ebc12bda8323e8e
font_01_sfnt_off0000ee5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5F 10316 bytes
SHA-256: 91ea0a564b0dafd3f1bac3e2a60b094999264908e1286cb6a64fd877dc4662ad

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