Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e89921efd6aa3d0…

MALICIOUS

PDF

77.5 KB Created: 2021-04-02 12:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 09433f653d492c5dafc07227730f2fc2 SHA-1: 44b99a881a0aae87aa6dd50b19517d98f5283cf7 SHA-256: 0e89921efd6aa3d098ddbd5a00b1db846e11f8cc8eb46695cde61b63a2bcd43a
174 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-severity finding for a suspicious link lure with invisible links to a suspicious domain. The ML classifier also assigned a very high probability of maliciousness. The document body is heavily obfuscated, but the presence of numerous external URIs and the ClamAV detection suggest it is designed to redirect users to malicious sites or download further payloads, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/award?keyword=american+gods+pdf+free+download PDF link annotation
    • http://jajuviramigawo.medianewsonline.com/acetylation_of_aniline.pdfIn PDF document text
    • http://loginwithfb.site/what_is_sonic_secret_menut18ru.pdfIn PDF document text
    • http://gifawel.22web.org/gazivuvezelilabijataxu.pdfIn PDF document text
    • http://mpvideo.org/92264214262c1c4y.pdfIn PDF document text
    • http://sochi2026.com/rudeselaxz0kkl.pdfIn PDF document text
    • http://mignonette.space/dayton_60_40_2_amp_battery_charger_manualeqty6.pdfIn PDF document text
    • http://fexevewuli.mypressonline.com/baldrige_criteria_for_performance_excellence_healthcare.pdfIn PDF document text
    • http://poverkavoda.website/18189795207oz19n.pdfIn PDF document text
    • http://fruitslope.online/gilgamesh_herbert_masonttiir.pdfIn PDF document text
    • http://center-san.ru/rumavajadiverevi30bml.pdfIn PDF document text
    • http://lnstagram-helps-contact.com/fetozogegeginhtnf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jugixumob.rf.gd/cara_membuat_curriculum_vitae_di_hp_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1470e19-ff31-48f6-a56d-742e5d41b34a/does_fitbit_track_jump_rope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8d82e40-ec34-444f-9e9e-a8fb94b6af04/cuanto_cemento_necesito_para_un_metro_cbico_de_concreto.pdfIn PDF document text
    • http://vuropomap.epizy.com/obat_analgesik.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_off0000f1c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C4 5556 bytes
SHA-256: 773d3c97de4244cd131c24b62028dac2d61decbe64c4e647692332708138616f
font_01_sfnt_off000104a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A7 10656 bytes
SHA-256: 7269c20a0e7f4b2024eff3dc9c6a90ea3ef3df0e1eb7f8f8ca409f8b4d5dc157

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