Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a8a010c727d8d61…

MALICIOUS

PDF

79.5 KB Created: 2021-03-31 04:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1dffd8011dfad6dce91aa3b5fd9c5145 SHA-1: d764f891d8c14f12ab6297f92c9956238b5cf029 SHA-256: 1a8a010c727d8d61e35ede32bcde48845ee1f73d61e343c63ede72017701ef68
146 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. It uses a callback-phone (TOAD) lure. 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 0.9990

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://pelibifir.ru/123?utm_term=donation+letter+template+for+sick+person PDF link annotation
    • http://sikazigazes.mypressonline.com/arduino_uno_starter_kit_projects.pdfIn PDF document text
    • https://zavodazokexa.weebly.com/uploads/1/3/4/6/134632977/sifasigawovenalume.pdfIn PDF document text
    • https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/rubadesonepo_mowomoroteru.pdfIn PDF document text
    • https://wexemexaxixu.weebly.com/uploads/1/3/4/7/134709907/bofifigabaxuraxuj.pdfIn PDF document text
    • http://gefavofatefazis.iblogger.org/hp_m1136_printer_datasheet.pdfIn PDF document text
    • http://canlisohbetim.net/jasoda_sarkar_all_baul_song510m0.pdfIn PDF document text
    • https://gasezojilatinoj.weebly.com/uploads/1/3/1/4/131455825/neripat-xoxapereniz-baram-kipido.pdfIn PDF document text
    • https://wujatukeki.weebly.com/uploads/1/3/1/8/131856991/mozota.pdfIn PDF document text
    • http://liwitesuzemumex.sportsontheweb.net/limiwevokesiwawapegagi.pdfIn PDF document text
    • http://e-devletturkiyeaidatsistemimgovtr.com/what_stretches_to_do_before_lifting_weightsto2fa.pdfIn PDF document text
    • https://vavivaso.weebly.com/uploads/1/3/0/8/130873957/134730.pdfIn PDF document text
    • https://xukonixivuki.weebly.com/uploads/1/3/0/9/130969652/5968521.pdfIn PDF document text
    • https://majejuwusi.weebly.com/uploads/1/3/2/3/132303270/juwesezusapuge-niledipa.pdfIn PDF document text
    • http://reduslim-official.website/fomevunedl62v.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
    • http://kitawijarital.epizy.com/after_effects_cs6_text_animation_tutorials.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37a658a0-29cd-4fd3-8cd6-a26461db6741/charles_dickens_a_christmas_carol_and_other_stories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c8272c-0d25-42cc-9501-8a0dd4871bb6/new_yorker_magazine_dec_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5454e468-ed27-4c04-9298-334a3e5aae1f/how_to_set_my_onn_alarm_clock.pdfIn PDF document text
    • http://jipegutakaxe.rf.gd/suzuki_book_one_piano_accompaniment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4755739f-b082-4525-a8f0-2435e88120fa/68268009042.pdfIn PDF document text
    • http://bebojivim.myartsonline.com/xirevafedutege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2353e987-3465-420d-8848-5e135896e3d1/what_does_error_cf_mean_on_a_canon_camera.pdfIn PDF document text
    • http://zudugib.epizy.com/omero_iliade_baricco_gratis.pdfIn PDF document text
    • http://bokatamekal.rf.gd/43958368105.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_off0000eea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA2 5012 bytes
SHA-256: 8e82c57ee5807577f886dbd6e0b624657b8f3736e326106ea90bda36b662a190
font_01_sfnt_off0000ff8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8F 10068 bytes
SHA-256: 0311a6ebf837bafd7f7f76328289b840377272db28d7fbf66f966e449d0714fb
font_02_sfnt_off00012220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12220 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e