Malicious PDF — malware analysis report

Static analysis result for SHA-256 5614204dc1adbb81…

MALICIOUS

PDF

88.2 KB Created: 2021-03-25 02:51:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: bf207e392bca6c0a61a854a83bb1cf5f SHA-1: a72519f0a3a417ed62357728247a820a3093c793 SHA-256: 5614204dc1adbb817d91299ca32bd44e0b3270cea1446c5f457520f0985c5399
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://leonvi.ru/wix?keyword=square+quick+apk+2018 PDF link annotation
    • https://cdn.sqhk.co/notizejamebo/ieicXHj/paper_mario_amazy_dayzee.pdfIn PDF document text
    • http://cmb-accueil.com/how_to_install_hp_3050_printer_on_windows_107va2r.pdfIn PDF document text
    • http://straponartist.com/37204174138ri5q2.pdfIn PDF document text
    • http://sukuwodexi.scienceontheweb.net/honeywell_vista_128bp_installation_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/gidulikegel/ggRBAVA/charli_d_amelio_wallpaper_app.pdfIn PDF document text
    • https://cdn.sqhk.co/fowipovoji/aAjdjcI/30075940395.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwozobo/gjiaBeZ/frases_tumblr_cortas_de_libros.pdfIn PDF document text
    • https://cdn.sqhk.co/medijamowole/rjgrnha/dodonukibe.pdfIn PDF document text
    • http://kunujunekedi.mygamesonline.org/38834605072.pdfIn PDF document text
    • https://cdn.sqhk.co/rozopebak/giiacyU/32530781752.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/ihx4jdB/lonedabelizipunuken.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/vazovodorokozaxilofega.pdfIn PDF document text
    • http://galoomer.online/715408447428yc08.pdfIn PDF document text
    • https://cdn.sqhk.co/luwiliziv/qgcUQif/sample_business_case_study_format.pdfIn PDF document text
    • https://cdn.sqhk.co/monasomeb/gd7aibV/cooking_dash_chateau_creep_season_4.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/quotes_from_dry_by_neal_shusterman.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/96gcijA/control_products_denver_colorado.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://milebulijulami.onlinewebshop.net/chaos_magic_banda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d89afe10-abbc-4b5a-aeb0-96b389da80d6/82729647241.pdfIn PDF document text
    • https://c18d7360-3707-4bf1-9d6f-52ba7510fa17.filesusr.com/ugd/76cb06_cd75c9f4c53d4f8fabe3d7244596c905.pdf?index=trueIn PDF document text
    • https://711920be-b761-4f0e-a604-762b26663b16.filesusr.com/ugd/ffcbea_dffb4fcc20b44f4b973c06b96f7423a3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbf05459-31dc-4e1e-8ee1-8db5bda3c179/kewisokovifonusovajide.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00012e64.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12E64 20760 bytes
SHA-256: e1a6e28bab3a40c8809ae9dacad3cbc3de840cc10a9f7dadd842a6fc1db7b96f
font_00_sfnt_off0000ea24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA24 5532 bytes
SHA-256: bf3b5505db43a1010aebb6dd1863c0aa4f1c9823303c99949822bb7d9e6647ea
font_01_sfnt_off0000fd0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0F 2188 bytes
SHA-256: cc74864b373dfc0cb4a084c8f51a62b5b6b6aac59357dacca32cd0f78cb7ce13
font_02_sfnt_off0001072d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072D 11424 bytes
SHA-256: 57e1c3e618a88ad35f87160ee5fbe4f29b21310891a2f68689ce3a0eb500f0a5

Open this report in the interactive analyzer, or submit your own file for analysis.