Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d684b223257aafe…

MALICIOUS

PDF

67.6 KB Created: 2021-02-10 00:22:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ad05c0041aa235905bab7072b408acda SHA-1: b709b248db3f744cda79695feb2c5910cbc9c87f SHA-256: 4d684b223257aafea10445943d7273f12e4d9c7ad4185037dbb14e591cb8a177
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution 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 0.9157

Heuristics 4

  • 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 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
  • 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://maypoin.ru/aws?utm_term=status+for+whatsapp++apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4468259/normal_5fcff49d08eba.pdfIn PDF document text
    • http://liko-sneakers.com/android_tv_box_x96_mini_firmware3zsje.pdfIn PDF document text
    • http://bloodcraft.online/71629223019jqjue.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481155/normal_5fe7d83a7e75c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391624/normal_5fe5104cb9eda.pdfIn PDF document text
    • http://sellamorem.com/agrobacterium_ti_plasmids6p36.pdfIn PDF document text
    • http://jitokinut.iblogger.org/wefazanijopid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412161/normal_60108b5ced5d3.pdfIn PDF document text
    • http://xevanaz.iblogger.org/likikuponupizotoxemodibu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484383/normal_6004963e965b3.pdfIn PDF document text
    • http://granitmetrospecstroy.ru/jatoperagebomazetojesapi0nlkl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://menufuvaso.rf.gd/handloom_bed_sheets_online_shopping.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/retugovobasexiwemetepu.pdfIn PDF document text
    • http://viwefar.rf.gd/automatic_reply_message_template.pdfIn PDF document text
    • http://naxokagad.epizy.com/bamiditux.pdfIn PDF document text
    • http://zozezad.epizy.com/zewezatip.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/kilamaserewamukageromek.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/jivozow.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/interlocking_bricks_mixing_ratio.pdfIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000bca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCA8 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off0000cc9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC9C 5216 bytes
SHA-256: cd5e5d4da90f8254c181244b0022bb159c818dcefdaccc28363a6d219a95dfea
font_02_sfnt_off0000de62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE62 8484 bytes
SHA-256: 5157544abd9c62e38d2e45e31ba6ff2c3f912baee46b32ffd8a25bc275a1a27a

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