Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2f43a9e7b014f2…

MALICIOUS

PDF

137.2 KB Created: 2021-03-21 01:39:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4d2c2394603650a77ce53100eb8e8ee0 SHA-1: 57013e50d40c430b40ba352385550c90fb65c022 SHA-256: ed2f43a9e7b014f296f2127805b8cb67f6d2e171a7f9e4555fcc1793139ffaba
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 0.9970

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://jumiwimov.ru/123?utm_term=bajau+laut+pdf PDF link annotation
    • https://zetoruribafepa.weebly.com/uploads/1/3/1/4/131452904/ganapirowime_xorusas_rofibete_wutotu.pdfIn PDF document text
    • http://zozexijogukemep.iblogger.org/got_risk_rules.pdfIn PDF document text
    • https://xebadaminel.weebly.com/uploads/1/3/4/5/134523447/daveluwuzofoxure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372982/normal_5fd8c8bfdae5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488336/normal_6026b3a5e8fb7.pdfIn PDF document text
    • https://luwanolukurodo.weebly.com/uploads/1/3/5/3/135397368/retaxujilo-rivapugefan.pdfIn PDF document text
    • https://rupevegix.weebly.com/uploads/1/3/4/8/134887155/78e0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379032/normal_5fcd1e9a7e0c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388426/normal_6008216778868.pdfIn PDF document text
    • https://tagopudul.weebly.com/uploads/1/3/5/3/135392217/pugexubu_kuwegixobe_xorogevufe.pdfIn PDF document text
    • https://nitevafatuva.weebly.com/uploads/1/3/4/8/134872456/cc8b046eaf946.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/7298235.pdfIn PDF document text
    • https://wiwokuvivatazu.weebly.com/uploads/1/3/4/6/134629214/xujonewifisuri.pdfIn PDF document text
    • https://susutabum.weebly.com/uploads/1/3/4/4/134464128/modex.pdfIn PDF document text
    • http://fafuzum.sportsontheweb.net/marathi_opposite_words_list.pdfIn PDF document text
    • https://vifazadaza.weebly.com/uploads/1/3/4/8/134883600/xobibikabudit.pdfIn PDF document text
    • https://kexujutexaz.weebly.com/uploads/1/3/1/8/131858540/7730412.pdfIn PDF document text
    • https://vipagavufedolaz.weebly.com/uploads/1/3/5/3/135350232/kurere.pdfIn PDF document text
    • https://tesiligozi.weebly.com/uploads/1/3/1/4/131407846/fakijogaxinetew_jobiwilutige_dozebawuvamume_zixirunukugefim.pdfIn PDF document text
    • https://nuvitofoje.weebly.com/uploads/1/3/4/6/134640236/pulofigitajim.pdfIn PDF document text
    • http://lamanixumerad.mypressonline.com/how_to_set_up_homeworx_digital_converter_box.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wodasakuzetu.rf.gd/minecraft_animation_maker_for_android.pdfIn PDF document text
    • http://bopewexe.onlinewebshop.net/79213805599.pdfIn PDF document text
    • http://noxanaviki.rf.gd/1000_vocabulary_words_with_meaning_and_sentence.pdfIn PDF document text
    • http://lizilozenoz.epizy.com/bootstrap_3_form_example.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_off0001c87f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C87F 5028 bytes
SHA-256: c847c402ddcb8c2cca82a6504baeb135936d384a4afd1453555d186c1e89d4ad
font_01_sfnt_off0001da0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DA0F 4888 bytes
SHA-256: b524800906d63b3179616e113b6be0da61c1737334c10061f6e7656eafdef970
font_02_sfnt_off0001ead0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EAD0 12916 bytes
SHA-256: f0b58ff48e747284f4b6ad0fbc5c4f4bc7df51f4cddd000d1db72037f2e3ed46