Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe1b3ed9aeb510f…

MALICIOUS

PDF

101.9 KB Created: 2021-05-01 12:42:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2884d1c72f09df553bd9753829076361 SHA-1: 1770d7d5f56e6954a4f1b8f15600714e103719c5 SHA-256: 5fe1b3ed9aeb510fedd9a0e3309f133b65efaae48a78b2b3a784b008a2b063c3
206 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a QR-code lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=lifesmart+infrared+quartz+stove+heater+with+digital+remote PDF link annotation
    • http://natlegend.space/marketing_management_philosophies_in_hindikxi1q.pdfIn PDF document text
    • http://devlp.club/bikini_body_guide_kayla_free6s9fy.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/dwOxgeQ/taforivusi.pdfIn PDF document text
    • https://cdn.sqhk.co/ninuxoti/XDqia4W/geometry_dash_unblocked_download.pdfIn PDF document text
    • http://form-copyrightservices.com/the_pledge_of_allegiance_in_spanish7ach0.pdfIn PDF document text
    • https://cdn.sqhk.co/butituguxur/hfrhdt6/76095454170.pdfIn PDF document text
    • http://realnoe-obshenie.online/call_me_by_your_name_script_fatherkqnds.pdfIn PDF document text
    • http://aycotoro0.xyz/41686146049sgbej.pdfIn PDF document text
    • https://tutemedoz.weebly.com/uploads/1/3/2/8/132814241/8970598.pdfIn PDF document text
    • http://introdom.ru/71606839543fkpei.pdfIn PDF document text
    • https://cdn.sqhk.co/novimabe/jcjhYid/boss_tuner_apps_for_android.pdfIn PDF document text
    • http://rebelliona.online/42190508375wxqj3.pdfIn PDF document text
    • https://cdn.sqhk.co/wabogojo/GwhaEGK/test_virus_website.pdfIn PDF document text
    • https://cdn.sqhk.co/kimazibo/YhhEpVy/kof_98_um_ol_mod_apk_download.pdfIn PDF document text
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/xuxagutelawor.pdfIn PDF document text
    • http://rocketdocs.us/japan_tsunami_2004_informatione6o4b.pdfIn PDF document text
    • http://mmamba.ru/java_8_update_191_download_64_bit_windows_7mfkto.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/1d08d2f5-844a-48ba-a01f-86e9847e673f/63494454702.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b5de6c3-3c03-45b1-bcdd-3e2ccc10e036/xodelen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f078de65-4172-43c6-804e-308eb61a5ebd/kipetixozugute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f85f82f3-9c66-42ee-9b80-8f613aac57f6/verifone_ruby_ci_manual.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_off00014b17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B17 5588 bytes
SHA-256: 26037f66996be00dc4d6eef7fca1f6ce25f22a8b6a959bdafaba40eb97cb13b7
font_01_sfnt_off00015e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E09 12788 bytes
SHA-256: b571a4c8eae8e77ccf6633c253071cb54bd613c6b08bf68355b738f9c3642e50

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