Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d213dc8414744c9…

MALICIOUS

PDF

75.2 KB Created: 2021-05-01 18:41:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6bbdf7a5775123d943043650c0aa7e43 SHA-1: 102222fd6ca63b66d4bcba255d5cfadd6e6182d4 SHA-256: 2d213dc8414744c99cd61f44abbe26dda3696d8cb19e27f0d4864b81fbe3fb6a
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 0.9991

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://gimoguvi.ru/strik?utm_term=how+to+report+statistics+in+medicine PDF link annotation
    • https://jafoxoxuxovawe.weebly.com/uploads/1/3/0/8/130813536/xepuvovuwaziposipoji.pdfIn PDF document text
    • https://cdn.sqhk.co/xavipinav/ijghggr/xatigatekadaj.pdfIn PDF document text
    • http://vitetoka.scienceontheweb.net/39347121374.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/zgh8Qjf/trial_xtreme_4_apk_download_uptodown.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385014/normal_600839d581f44.pdfIn PDF document text
    • http://liwurivosopap.medianewsonline.com/peloperatiruropuvonekixaj.pdfIn PDF document text
    • http://lirebuwoke.mygamesonline.org/gekepig.pdfIn PDF document text
    • https://ribofefafuf.weebly.com/uploads/1/3/4/7/134770843/b9b970c7af2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446930/normal_601177d430bdd.pdfIn PDF document text
    • https://cdn.sqhk.co/kapideto/Q4jiKge/30779976159.pdfIn PDF document text
    • https://dedemapisiwopiv.weebly.com/uploads/1/3/0/7/130775251/likepokapulama.pdfIn PDF document text
    • https://fabopabe.weebly.com/uploads/1/3/4/7/134704260/7004917.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/ijjdjiS/m24_gun_pubg_ringtone.pdfIn PDF document text
    • http://dufigep.scienceontheweb.net/minax.pdfIn PDF document text
    • https://cdn.sqhk.co/gopefovepagi/dtjdBia/frozen_synapse_prime_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/dikabopagesi/tYjiaJX/jabra_sound_app_store.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/jesapaniveva.pdfIn PDF document text
    • https://cdn.sqhk.co/kosadara/njapjbz/criticize_word_forms.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411483/normal_600533b842917.pdfIn PDF document text
    • https://tifevijokob.weebly.com/uploads/1/3/5/3/135351552/xebukabud.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/xufaxoferugod/organizational_culture_meaning_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/is_tiger_an_endangered_animal.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/kejixofikasu.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/70-761_exam_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/9934994940.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_off0000e87f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87F 5240 bytes
SHA-256: 7cc0073a5cf4fd531856b81d4a08ab9f68bab12045ef9ac984beb4a9008ecd36
font_01_sfnt_off0000fa43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA43 10920 bytes
SHA-256: 5bc960d9e264d56e9bd411a724033d8d6e388bff55065ae89603569992fbb41d