Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca6df20c9ff78abc…

MALICIOUS

PDF

84.8 KB Created: 2021-04-08 03:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bf486a00ee97d6a6b8a7be6d444f87a5 SHA-1: b43685ecedb1964affa6c46b3cde0497d4a6782f SHA-256: ca6df20c9ff78abcfadd87e563b0121d02f143b70b537cb5869276e013f07a93
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting an attempt to redirect users to malicious sites. The PDF structure and embedded content are consistent with a phishing lure, likely intended to trick users into downloading further payloads or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://druttle.ru/123?utm_term=los+adioses+juan+carlos+onetti+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412900/normal_5ff6832042cc3.pdfIn PDF document text
    • http://zupinuxuxodu.iblogger.org/cbse_biology_syllabus_for_class_11.pdfIn PDF document text
    • http://zomosidotewe.sportsontheweb.net/essential_business_english_vocabulary.pdfIn PDF document text
    • https://dilozerekake.weebly.com/uploads/1/3/1/4/131452754/1003421.pdfIn PDF document text
    • http://suporefebakibur.mygamesonline.org/free_vegetarian_keto_meal_plan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414691/normal_605429224a0ee.pdfIn PDF document text
    • http://jutidewolojura.mypressonline.com/34607803819.pdfIn PDF document text
    • https://rizigavitud.weebly.com/uploads/1/3/4/5/134581125/ralutuwevipesa-gutuparowulox.pdfIn PDF document text
    • http://sopafekidis.sportsontheweb.net/31058987859.pdfIn PDF document text
    • https://jasezanita.weebly.com/uploads/1/3/1/6/131637239/pezubipuzidodu-wexop-zoguxurir.pdfIn PDF document text
    • http://kavuxolabazili.iblogger.org/dizixorivokomut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pexirofovuj.rf.gd/megokewovo.pdfIn PDF document text
    • http://vipojidetag.epizy.com/kibukomomikiwekubuvet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55efa809-918c-481f-b2fd-1af64a9a775b/hp_stream_11-ak0006na_11.6_inch_laptop_white.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/samsung_galaxy_note_3_battery_charger.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/86993141673.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/wevakejudula.pdfIn PDF document text
    • http://susejukeb.epizy.com/fagov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de15962c-2ed5-43c7-b6da-af98e7aa9a49/96234871110.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/chick_fil_a_online_application.pdfIn PDF document text
    • http://jelomasulavi.atwebpages.com/angelcare_bath_seat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e30a7a4b-8aaf-447a-9eb7-e00664e52a22/winchester_model_12_riot_gun_review.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/kewekuveteb.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_off00010b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5D 5164 bytes
SHA-256: 4fbf5f7cccdebe808a161c01c04fd961a97b04dc368b8089bb43efb666f9cf99
font_01_sfnt_off00011d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D0A 12172 bytes
SHA-256: bbf473d1fe852011d358a595c237daa4ed144149f1aaa82d0fc6c4864f09c60a

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