Malicious PDF — malware analysis report

Static analysis result for SHA-256 05a9c864114e29f4…

MALICIOUS

PDF

84.6 KB Created: 2021-03-07 21:24:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0b27dfc9059a94a0842733422204e9a0 SHA-1: 1b3d0f6349077aa3f2ef7e4f45ef4b6a1b3b340c SHA-256: 05a9c864114e29f45f79c0ada7301883fb175e50d52a7c81dea26209c43b103c
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 0.9985

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/wix?keyword=answers+from+the+afterlife+nanci+danison PDF link annotation
    • http://pizedajunar.22web.org/auto_navi_mit_google_maps.pdfIn PDF document text
    • http://xogubafirugufa.iblogger.org/all_of_me_piano_violin_sheet_music.pdfIn PDF document text
    • http://zipaxuko.iblogger.org/43157596912.pdfIn PDF document text
    • https://gidorimafemona.weebly.com/uploads/1/3/4/8/134867851/a924bf.pdfIn PDF document text
    • https://vefajuvajodal.weebly.com/uploads/1/3/6/0/136094574/3952377.pdfIn PDF document text
    • https://bemakidej.weebly.com/uploads/1/3/0/7/130739127/kipirawokavaziku.pdfIn PDF document text
    • https://nefadojajekewa.weebly.com/uploads/1/3/0/8/130874163/pozasuxipobibezopipa.pdfIn PDF document text
    • https://tetuxexe.weebly.com/uploads/1/3/1/8/131871535/810a7a3e4194ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fofeparulofiz.rf.gd/dexada.pdfIn PDF document text
    • http://foxivowopejo.rf.gd/how_to_setup_arc_on_onkyo_receiver.pdfIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_0cb93a6372b64297be10dc140579ea4e.pdf?index=trueIn PDF document text
    • http://jozeratajugik.rf.gd/backseat_driver_song.pdfIn PDF document text
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_27b8071266ee47c79f833cf6a8901ae1.pdf?index=trueIn PDF document text
    • http://warufadul.rf.gd/10924964744.pdfIn PDF document text
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_98c036b1f51e43afb05823518d857456.pdf?index=trueIn PDF document text
    • http://pevinojemodil.rf.gd/noxiwetujegur.pdfIn PDF document text
    • http://bikutuvuxaxixo.epizy.com/facebook_app_free_latest_version.pdfIn PDF document text
    • http://tiriburud.rf.gd/6978566251.pdfIn PDF document text
    • http://notalopelovawu.epizy.com/gap_analysis_report_format.pdfIn PDF document text
    • http://ruduwemuzivikis.epizy.com/jijorebes.pdfIn PDF document text
    • http://xogeguf.rf.gd/nalorupipokugagomugebibez.pdfIn PDF document text
    • http://fokozagizek.rf.gd/64534758523.pdfIn PDF document text
    • http://jumebesatupa.epizy.com/50626893000.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACA 6588 bytes
SHA-256: b3260a8b27c40a1c9408c40b3dcfb9ec9ded560232013cbc1ca8de37ebb5a831
font_01_sfnt_off0000fb44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB44 5344 bytes
SHA-256: 598c23e3f7503bfe1600d5ea1d4517b1614357deacb9bdfbde24150f97eccf44
font_02_sfnt_off00010d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4A 3908 bytes
SHA-256: 2853212b360b119cd580d744122918cc91ce854c38a34be960099d05cc215bcd
font_03_sfnt_off00011c1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1C 11508 bytes
SHA-256: c73c6938426ec5b709308fc6a3526697eda8dad3a5d9a890053a482688c04890