Malicious PDF — malware analysis report

Static analysis result for SHA-256 d99880eeab727f8f…

MALICIOUS

PDF

86.6 KB Created: 2021-03-18 10:46:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e46f63c0a4b9b520c045e844be3e274f SHA-1: ec2441bf1f9f4fa6a834a27b736b41d6b3a8f267 SHA-256: d99880eeab727f8fea3c97362d7240d4b8dec40cd012c6e83ca2330051ba9f32
126 Risk Score

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 0.9983

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
  • 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://midufefew.ru/123?utm_term=amma+appa+heart+image PDF link annotation
    • https://cdn.sqhk.co/norowitidot/gdiKbhi/nuxewawov.pdfIn PDF document text
    • http://zitalogeloluwiw.mygamesonline.org/82724606922.pdfIn PDF document text
    • https://cdn.sqhk.co/delotijuw/c57heSb/41002466846.pdfIn PDF document text
    • https://cdn.sqhk.co/jerowerar/iidjgbW/my_video_tube_downloader_apk.pdfIn PDF document text
    • http://jagefefixod.22web.org/kamosawage.pdfIn PDF document text
    • http://madamewezakab.iblogger.org/dewalt_miter_saw_stand_modifications.pdfIn PDF document text
    • http://remastacer.com/swann_security_camera_review_youtubeqg5wd.pdfIn PDF document text
    • http://e-devletodeme.net/xazivumatatitezubu3rbc.pdfIn PDF document text
    • https://cdn.sqhk.co/sadinuko/cghgehf/tawagin.pdfIn PDF document text
    • http://vawuxipofuf.iblogger.org/14503295623.pdfIn PDF document text
    • https://cdn.sqhk.co/supekokabe/iiejcgi/joredavesu.pdfIn PDF document text
    • http://sesesuruko.mypressonline.com/how_do_you_start_a_body_paragraph.pdfIn PDF document text
    • http://daimontimur.org/ziwadumepakezimabofikokocwrp.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/jgJhe4K/party_music_video.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://tedejokalegiruj.epizy.com/free_movies_online_hd_forever_apk.pdfIn PDF document text
    • http://javuxanasojajex.epizy.com/kokidifekixijonapagireleg.pdfIn PDF document text
    • http://pizenusogusu.atwebpages.com/51453545786.pdfIn PDF document text
    • http://lenidifumejuvig.rf.gd/wirujaxuvisumitusul.pdfIn PDF document text
    • http://leparitupoxow.onlinewebshop.net/rodaraka.pdfIn PDF document text
    • http://puvafimawebeka.epizy.com/step_10_questions.pdfIn PDF document text
    • http://lofunadex.myartsonline.com/35022903257.pdfIn PDF document text
    • http://vobisobopimab.epizy.com/attico_chassot.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD641 2984 bytes
SHA-256: 63ef795dbd8405195523e8006c45b410f4a9c36a7bff8935b1cf1e263c26bfa7
font_01_sfnt_off0000e0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E6 5012 bytes
SHA-256: 87341ec971c624e2af615c4378857ca6086be6220a44dd84dd6968ac92214b22
font_02_sfnt_off0000f1c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C2 5068 bytes
SHA-256: fb3ef59eab0e336d7fbd5b05da2600203d3fa558273f01984a98104c22bebfbf
font_03_sfnt_off00010295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10295 5856 bytes
SHA-256: 1d5d565a02ff34f2cd758cac0b89e0d8242f64092763558c0d116749c061cc56
font_04_sfnt_off000114f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F1 9900 bytes
SHA-256: 061d9b5520c8ace690a7c6097efd6c5baf4223cd9f3802ff413c2effedb818a2
font_05_sfnt_off000136ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136AE 16164 bytes
SHA-256: 3afbc95f4a2677bf4c8b77bd7df62e4dbeb651db4b5e482cf97b58e472170d58