Malicious PDF — malware analysis report

Static analysis result for SHA-256 6163c72d7718b98e…

MALICIOUS

PDF

71.9 KB Created: 2021-02-15 12:29:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bcf0db3d1ac0301992355cd0354b3ed4 SHA-1: 2290e56a23de5a6299612d7ec8c1208bf3da059b SHA-256: 6163c72d7718b98e52c4c41cc34887ded13df5e9501059f28e1d225d497931f2
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or scamming purposes. Although no scripts were directly extracted, the PDF structure and embedded URLs point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://crophysi.ru/strik?utm_term=garmin+astro+220+extended+range+antenna In PDF document text
    • https://cdn.sqhk.co/fusajovogi/wdII3ge/toolbox_widget_socket_organizer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455894/normal_6005e1f2a6ca8.pdfIn PDF document text
    • http://reduslim-eu.site/77876074310bz6nm.pdfIn PDF document text
    • https://xexiroxenokela.weebly.com/uploads/1/3/4/6/134613030/704729.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449185/normal_6001d771c105d.pdfIn PDF document text
    • https://cdn.sqhk.co/mitebosareki/ed5jbJ5/bream_fishing_hard_body_lures.pdfIn PDF document text
    • https://cdn.sqhk.co/bemoranoz/ejahghj/ear_infection_symptoms_baby_congestion.pdfIn PDF document text
    • http://akvatehnika74.ru/tamil_horror_movies_isaiminiv3jgq.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuzigup/dicigjb/dimipotasajulodawu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413120/normal_5ffcd669c5b82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452392/normal_5fd3aa3c09612.pdfIn PDF document text
    • https://cdn.sqhk.co/lesepivir/gkjbohf/sonny_with_a_chance_episodes_season_3.pdfIn PDF document text
    • http://ekzo-fruit.ru/the_absite_review_practice_questions_free_downloadmq952.pdfIn PDF document text
    • http://parhelifrl.space/spontaneous_bacterial_peritonitis_guideline46i4z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418985/normal_5ff9ce38c6c71.pdfIn PDF document text
    • https://miletobe.weebly.com/uploads/1/3/4/8/134860907/6d8f4e7c9af9bde.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403413/normal_6003566eacbb7.pdfIn PDF document text
    • https://zimuwinosozenuj.weebly.com/uploads/1/3/0/7/130740464/8ff33b52cd2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/julaxel/destruction_warlock_classic_wow_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/bluetooth_apk_for_pc_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/jiripojarasuju.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/xoneniturojotujusasikiwu.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA28 5484 bytes
SHA-256: 09f723b17e7fb887ec6a587ba54c05e5bc7b0a9af119cec852f0cf6ffd796036
font_01_sfnt_off0000dcb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB5 6068 bytes
SHA-256: 7a02da73c5ff24218d04b188db7d31ceb9303d5dedd43b645f18a615a19d9b6a
font_02_sfnt_off0000ec66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC66 11056 bytes
SHA-256: 424c39899789a86761b06943ba2a087b9831b1e5bf7294593af7c6a52dbfd5af