Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb098265eacd8a7c…

MALICIOUS

PDF

86.0 KB Created: 2021-04-02 13:30:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: cb652ad51855ed06767ca3f58e3167f9 SHA-1: 0725394749ef64d360beba62a891f1e3900cfc0c SHA-256: eb098265eacd8a7c72a8f98452e2e748ed19af9bf4382e2e7f401890928c1ebf
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers identified this PDF as malicious, specifically flagging it as a phishing or trojan. The embedded URLs suggest a potential for redirecting users to malicious sites or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/award?keyword=moral+development+definition+pdf PDF link annotation
    • https://zozutogumudeke.weebly.com/uploads/1/3/4/4/134440166/basamukome-fonuki.pdfIn PDF document text
    • https://gozezitigaja.weebly.com/uploads/1/3/4/3/134340412/lefuwenij_veposiguseto.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CsaOhdD/77800013952.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/hgijjgy/subiputajagisumapejuka.pdfIn PDF document text
    • https://rurusoweloxefug.weebly.com/uploads/1/3/3/9/133989150/mexixizadigawe-belumolapaveti-nusono-narajifuwar.pdfIn PDF document text
    • https://zavetogodafewer.weebly.com/uploads/1/3/4/7/134709275/4230538.pdfIn PDF document text
    • http://kajejib.medianewsonline.com/printable_triple_yahtzee_score_sheets.pdfIn PDF document text
    • https://peletawipimo.weebly.com/uploads/1/3/4/4/134444154/9f9e0f98.pdfIn PDF document text
    • https://pabidiwamudobav.weebly.com/uploads/1/3/5/2/135299897/2704200.pdfIn PDF document text
    • https://cdn.sqhk.co/fovomesit/uieieb9/summit_trail_climber_at.pdfIn PDF document text
    • https://tufojeju.weebly.com/uploads/1/3/0/7/130740258/vupimuwoxeg.pdfIn PDF document text
    • https://cdn.sqhk.co/widobixi/idhhdjf/87076267084.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/gsBjijb/kujotinokon.pdfIn PDF document text
    • http://namabal.scienceontheweb.net/befogafunomonewixozisan.pdfIn PDF document text
    • https://cdn.sqhk.co/dugixikisim/hpiY48P/screen_time_app_limits.pdfIn PDF document text
    • https://bafuzonexive.weebly.com/uploads/1/3/0/7/130739369/2331679.pdfIn PDF document text
    • https://dodezugufiz.weebly.com/uploads/1/3/5/3/135331092/seriludajijaxap.pdfIn PDF document text
    • https://cdn.sqhk.co/merodobiweve/jf0lhjJ/my_block_scarface_mp3_download.pdfIn PDF document text
    • https://fejuratomejavud.weebly.com/uploads/1/3/0/7/130776174/fejuma_modigilapexop_mederiteduwisit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a934c2e4-b905-49c8-956c-575a0c05e03c/mi_home_security_camera_app_for_windows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d675b495-ccb6-4946-a96f-c9e6c3ca03cd/jubufisejan.pdfIn PDF document text
    • http://zonatitusajobo.onlinewebshop.net/miller_spectrum_375_replacement_torch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a25d4b74-9d4b-407a-81d7-40f669305fd6/what_is_asq_se_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a78f2e01-5536-4186-a392-90a0cb2be70f/58970420329.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_off000110f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F0 5076 bytes
SHA-256: 0063fdf950f2c1217e0502dbc2ab83b571af18b4b7f7c599a14482ad6fc09549
font_01_sfnt_off00012230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12230 11408 bytes
SHA-256: 8ca96e440db6231522661d90dfad148e51231b1bf4cc35058978fd4f8566819b