Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fbf70a05b4313ce…

MALICIOUS

PDF

83.7 KB Created: 2021-02-17 04:16:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4fc2c557b4cc9f1da60c4dd6d86c5fc9 SHA-1: b826eb30b711db9a8ab7b98d5537c01e4accb4cc SHA-256: 8fbf70a05b4313ce39b8bf30ab1ac6a37f2b4fbd30c53ea811c800762b2ceffa
186 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. 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 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://crophysi.ru/123?utm_term=how+do+i+fix+h97+error+on+my+panasonic+microwave PDF link annotation
    • https://cdn.sqhk.co/bokirebi/ajd7kg8/inkredible_handwriting_note_pro_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kejofuvata/Eifhdjb/shadow_galaxy_apk_download_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384301/normal_5fcecefb0f5c1.pdfIn PDF document text
    • https://gopasijokalurat.weebly.com/uploads/1/3/5/3/135399025/0fdb497c.pdfIn PDF document text
    • https://lefilima.weebly.com/uploads/1/3/0/7/130775934/fepaw-sakuwarekizi.pdfIn PDF document text
    • https://cdn.sqhk.co/tizesefetus/6hihehd/gun_strike_shoot_fire.pdfIn PDF document text
    • https://cdn.sqhk.co/zodunoxurob/jjjijfi/different_tie_dye_patterns_heart.pdfIn PDF document text
    • https://muwewixobajigu.weebly.com/uploads/1/3/4/3/134312624/8062203.pdfIn PDF document text
    • https://cdn.sqhk.co/sezunofubuzi/hh9jagj/12698833635.pdfIn PDF document text
    • https://vigodabazo.weebly.com/uploads/1/3/4/8/134872933/jinorodifelo-torujut-zovafo.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/Lm8ihup/tomijuxisipiwi.pdfIn PDF document text
    • https://cdn.sqhk.co/busosuwik/PcjdWjg/ted_talks_meaning_in_telugu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404514/normal_5feda0cec78a3.pdfIn PDF document text
    • http://gewewenaso.iblogger.org/fugivame.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fedojigudaj/54682199485.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/gulalewusatijeni.pdfIn PDF document text
    • http://pevivudawof.epizy.com/templates_for_certificates_of_recognition.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/terewamujekuwovux.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/free_raffle_ballot_template.pdfIn PDF document text
    • http://vetisuduxujin.epizy.com/hotel_california_eagles_song_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F8 5592 bytes
SHA-256: add4e103cfb475d808a4e67a28c187d5c677a432aba0475232571e72e825f0ab
font_01_sfnt_off00010ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE6 11244 bytes
SHA-256: 8c56a53f686ed70b7f11a8d5864ef4cfe6bc308e9d803f1aeb6de2e7d7e33ea7
font_02_sfnt_off0001316f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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