Malicious PDF — malware analysis report

Static analysis result for SHA-256 240243e07bb64c11…

MALICIOUS

PDF

84.6 KB Created: 2021-04-13 20:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 30fc2fab52b1bca845cf47d9c1fe7ff0 SHA-1: 54537a79a7a9d17705a7f8ec53d47289b9351551 SHA-256: 240243e07bb64c116ec4a6ec2a0eb6a2ea8239012731f2bcb1a0a97109890f27
186 Risk Score

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 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=ukulele+for+dummies+cd+download+pdf PDF link annotation
    • https://rawiranuxox.weebly.com/uploads/1/3/4/6/134618620/pigutoleladir.pdfIn PDF document text
    • http://azorocheat5.xyz/518947229087i53r.pdfIn PDF document text
    • http://vomuniwawan.iblogger.org/8595505618.pdfIn PDF document text
    • https://foxesomi.weebly.com/uploads/1/3/0/7/130775893/xujoduvik-kodemezuvimug.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/lafen.pdfIn PDF document text
    • http://yildirimotobursa.com/37723553711hbl8w.pdfIn PDF document text
    • http://enots.space/fitbit_versa_lite_straps_canadaiqvjf.pdfIn PDF document text
    • http://raisinsapp.pro/rinefigopomavisikomaduq2pdt.pdfIn PDF document text
    • https://jikovezogid.weebly.com/uploads/1/3/1/4/131407088/tigikomaxub.pdfIn PDF document text
    • https://cdn.sqhk.co/ridijafugemi/eIhjQje/kezegefapip.pdfIn PDF document text
    • http://drive4mclaneeffingham.com/22354429405s6mjm.pdfIn PDF document text
    • https://cdn.sqhk.co/xurakipigub/jfYOAif/14366461472.pdfIn PDF document text
    • https://cdn.sqhk.co/xajamenujo/d6Fhejg/prison_break_cast_season_4_episode_23.pdfIn PDF document text
    • https://rusepokobedog.weebly.com/uploads/1/3/4/3/134366979/vifinibakol-bikadijo-jonelorikuvob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sitidex.epizy.com/net_rental_income_calculation_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/amplificador_de_potencia_clase_a.pdfIn PDF document text
    • http://sukilik.epizy.com/maastricht_iv_guidelines_helicobacter_pylori.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/new_christmas_carol_film_cast.pdfIn PDF document text
    • https://0298dc5a-7924-4276-8279-06452a5288da.filesusr.com/ugd/b30cf0_d5d41fbaba204b4aab669a23770a890a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/figugipopar/nuwutoborokeronened.pdfIn PDF document text
    • https://ac685e6e-6442-44c0-91a1-b3a367e79ef2.filesusr.com/ugd/ce77c6_8af727301d354a9a87f70383e0866a4b.pdf?index=trueIn PDF document text
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_d04ce0cebf394aea826168b4db1b46a6.pdf?index=trueIn PDF document text
    • http://masomivi.rf.gd/sig_p238_vs_kahr_p380_size.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/butimizi.pdfIn PDF document text
    • https://d6504552-49b0-4b7d-b1ff-94f9e1082b83.filesusr.com/ugd/1f0558_1cedfe5e292e489180ded441fcdd1618.pdf?index=trueIn 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_off000108e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E4 5448 bytes
SHA-256: 6afea9499dff56fdcca937ce7fd4046bd17a0893c67203bdf4439479a28f19c5
font_01_sfnt_off00011b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B75 13236 bytes
SHA-256: 26ce1a1a073865960505103de639643f1e7bb1b727ab9f6c2bf017932840034c