Malicious PDF — malware analysis report

Static analysis result for SHA-256 a372a973dc1145d8…

MALICIOUS

PDF

82.8 KB Created: 2021-03-16 20:04:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1fa89f6795307417a5b73d96ce695609 SHA-1: b2de30ad67f5ee15aaee4684c7af92d1a5a495ef SHA-256: a372a973dc1145d86bf03ad662d09c8cd7f722bec5a2703e24e9608ef1cbb4aa
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

Heuristics 5

  • 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 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://soxebez.ru/strik?utm_term=what+are+the+six+stages+of+moral+development PDF link annotation
    • https://koxawikala.weebly.com/uploads/1/3/4/6/134643159/4e6df4b746.pdfIn PDF document text
    • https://sinekagu.weebly.com/uploads/1/3/4/8/134855021/tixejoginevetu-lexikagojere.pdfIn PDF document text
    • https://burufazifefep.weebly.com/uploads/1/3/4/5/134584298/55fa8e.pdfIn PDF document text
    • https://romakajesak.weebly.com/uploads/1/3/4/5/134508807/fepil.pdfIn PDF document text
    • http://zedakobogesa.mypressonline.com/58728542986.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1000e54-ebb0-4c29-b7e6-731894afa307/a_to_z_verbs_forms_list_with_hindi_meaning.pdfIn PDF document text
    • http://gumusimigogasuz.onlinewebshop.net/43338645986.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/phpstorm_format_sql_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d916a5da-c3bd-4c23-9e07-4ad804499d9f/74615434917.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/56072875542.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/complex_sentences_worksheet_fourth_grade.pdfIn PDF document text
    • http://womidelere.myartsonline.com/the_veil_forest_hill_avenue.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/kaxavefiku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe4d36c0-a802-431a-b990-b167b524a202/xoxipi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/836a0a1e-78cd-49b4-9309-e5ab6580e5a1/element_tv_remote_code_for_xbox_one.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee5d67a5-a7b1-4902-905a-dbd045134a52/how_to_calibrate_samsung_plasma_tv_power_supply.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/what_is_strange_fire_according_to_the_bible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cadee603-42ce-479b-a5c9-62e7d1ac15bb/vibozuvosedodevida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac270916-20a3-4ff1-92f4-f26848f8e265/what_does_a_flashing_white_light_in_your_eye_mean.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_off000105b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B4 5596 bytes
SHA-256: 705a9e13845870051e878939ce976d007395140069c164e2d1c0a9b0fe13dbd3
font_01_sfnt_off000118a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A9 10940 bytes
SHA-256: 3af6558839516894b1c85268f4e0803925be6dd8046cb153ca661866b8d0d82f

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