Malicious PDF — malware analysis report

Static analysis result for SHA-256 c85e377e037a7a1c…

MALICIOUS

PDF

77.7 KB Created: 2021-03-03 04:13:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2960f58372aeb1b26705cfa61ea9894e SHA-1: b9534c81af6bb92c5c8eab48884c9971da5a0d76 SHA-256: c85e377e037a7a1ca8de626525f2f22afcf8344c349823fc41348d7d53eb88d7
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, appears to reference 'Harry Potter' to lure victims. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites, potentially for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/award?keyword=harry+potter+and+the+sorcerer%2527s+stone+summary PDF link annotation
    • http://detonic-ro.website/78780193342fd0le.pdfIn PDF document text
    • http://storedubai.shop/ordering_of_decimals_worksheets_for_grade_5edi6q.pdfIn PDF document text
    • http://kersita.space/monster_trucks_die_casts6pw4.pdfIn PDF document text
    • https://jurivulanikep.weebly.com/uploads/1/3/4/5/134525456/497d0.pdfIn PDF document text
    • http://firstflirts.site/young_five_faces_of_oppressiongeqja.pdfIn PDF document text
    • https://cdn.sqhk.co/fogobewataja/1CbGQwm/worldcraft_3d_build_craft_mod_apk.pdfIn PDF document text
    • http://mrshadow.net/black_and_decker_18v_cordless_grass_trimmerpjzhk.pdfIn PDF document text
    • https://vajojesorenum.weebly.com/uploads/1/3/0/9/130969616/6d9448ad758.pdfIn PDF document text
    • https://lapawiniposa.weebly.com/uploads/1/3/5/3/135323982/fasonu.pdfIn PDF document text
    • http://tajulixejeri.iblogger.org/mbti_fictional_character_test.pdfIn PDF document text
    • https://cdn.sqhk.co/dodamewope/jPicHeV/cash_day_loans_near_me.pdfIn PDF document text
    • https://piwutevuxave.weebly.com/uploads/1/3/4/8/134891910/sifamiselozeli.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/ciigcvm/snake_io_hack_mod_apk_download.pdfIn PDF document text
    • https://meremunodimabak.weebly.com/uploads/1/3/4/5/134516451/133930.pdfIn PDF document text
    • http://beststudent.fun/90667847769waw65.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C1 5212 bytes
SHA-256: 3062809d8f446a74b3011f8af52eca8db1a58a56d78cfb00323a81a7a4f80aa8
font_01_sfnt_off0000f74f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74F 10604 bytes
SHA-256: 72fee10eae417f47256413e449e5e67774063bf49ad54cde410b3efd757d1304
font_02_sfnt_off00011b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B90 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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