Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae323762aac309a…

MALICIOUS

PDF

79.2 KB Created: 2021-04-05 00:27:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 30929721b7049c723d8902f9674d591e SHA-1: 8587ed4c658595fc6c1213ac01599870f7f73d1c SHA-256: fae323762aac309adeb909ebc7e826d999ec9d35b3bdc8b43b6cae9e096861b1
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links pointing to known malicious redirectors and disposable hosting, indicating a phishing or malware distribution attempt. The 'SE_CALLBACK_LURE' heuristic suggests a potential callback phishing or tech-support scam pretext. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely involving the execution of further stages or redirection to malicious sites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/aws?utm_term=minn+kota+ulterra+112+72%2527%2527+shaft In PDF document text
    • https://cdn.sqhk.co/dixufeja/gdmFdRw/napepi.pdfIn PDF document text
    • https://cdn.sqhk.co/guregame/aIjiib8/3992709289.pdfIn PDF document text
    • http://podipotekoi.ru/gospel_hymn_sheet_music_free7hfhz.pdfIn PDF document text
    • http://xefibusutama.22web.org/cules_son_los_tipos_de_investigacin_cualitativa.pdfIn PDF document text
    • https://cdn.sqhk.co/xelimibela/ichg531/it_inventory_spreadsheet.pdfIn PDF document text
    • http://zulojijimom.iblogger.org/begizo.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/Da9xgcQ/easy_mobile_recharge_login.pdfIn PDF document text
    • https://cdn.sqhk.co/lugizumevemu/haDjaQi/joxet.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwokosokif/1wRgfhg/90445636960.pdfIn PDF document text
    • https://cdn.sqhk.co/sewuvavimebi/dhfagdu/30792087942.pdfIn PDF document text
    • http://kvrovk.xyz/houghton_mifflin_harcourt_collections_grade_12_answerslxww5.pdfIn PDF document text
    • http://stnold.com/35690503903nhdql.pdfIn PDF document text
    • http://zujavok.22web.org/21508704470.pdfIn PDF document text
    • https://cdn.sqhk.co/zosiwutu/8jaXigu/ruvixejojaposimuzof.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/dIv7Ijd/79585193785.pdfIn PDF document text
    • http://meetsoda.club/dell_emc_vxrail_datasheetwogeq.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/jhidhfY/88897918424.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rubuvajaroxe.epizy.com/avital_ronell_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/518b8873-403a-48b2-818f-bc2fa4c2f7d0/how_to_cancel_brinks_security_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00e61a83-e702-4e2f-8212-6b7e425329f0/nanostation_loco_m2_setup_windows_10.pdfIn PDF document text
    • http://jigategire.epizy.com/ravewoxenuzusevonawodida.pdfIn PDF document text
    • http://potolipok.epizy.com/butkov_mathematical_physics.pdfIn PDF document text
    • http://mabazekow.epizy.com/criticism_of_democracy.pdfIn PDF document text
    • http://javozajesaretu.epizy.com/96609929622.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_off0000f67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67A 5220 bytes
SHA-256: db1941ccf0e8a7fcb3831063011d1e4f5e76bef2102873eadcdd6c35648017d7
font_01_sfnt_off00010856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10856 11756 bytes
SHA-256: 2e7e01c1e1b1aa3fa593cc9dcf7acbb30c8ee4165596672017f08dbbcf0b66bb