Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc2a53640c870cee…

MALICIOUS

PDF

72.2 KB Created: 2021-03-19 03:43:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4673daa6444542d6925dcf67048f2602 SHA-1: 259d4c148f4c9c01fb10cff0d79d796ba7b58e6c SHA-256: fc2a53640c870ceee569a0ddc65c05670f2ae54e08f1dc77821c53d7f656b711
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous embedded URLs, with one specifically pointing to 'nipisod.ru/strik', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to a 'master reset' for a 'Sharp xe-a207', indicating a lure to trick users into visiting the malicious URL. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://nipisod.ru/strik?utm_term=sharp+xe-a207+master+reset PDF link annotation
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/kaloxi.pdfIn PDF document text
    • http://mp4.design/mississippi_community_college_district_map0je9f.pdfIn PDF document text
    • http://thechambre.xyz/plot_of_pippi_longstocking89p3u.pdfIn PDF document text
    • http://fresh-ita.space/alcohol_distillation_processwm8o2.pdfIn PDF document text
    • http://freshnatur.fun/karolujle463.pdfIn PDF document text
    • http://cosmicgig.com/janavodizovojunesupupanamw99w6.pdfIn PDF document text
    • http://duwesetizi.iblogger.org/bevexe.pdfIn PDF document text
    • https://datokusowijodo.weebly.com/uploads/1/3/0/7/130776434/dugol_xakefekekuwamub_jusotixaj.pdfIn PDF document text
    • http://wowurilagufa.iblogger.org/89915589758.pdfIn PDF document text
    • http://dom-bita.org/10_examples_of_irregular_verbs_and_its_past_formybvwb.pdfIn PDF document text
    • http://laithub.pro/bijopanehk8sx.pdfIn PDF document text
    • http://lnstagram-blue-badge-form.com/tutiwazerf1mk.pdfIn PDF document text
    • http://xejevojesinil.22web.org/pilig.pdfIn PDF document text
    • http://gumugupibope.iblogger.org/tusigafenebak.pdfIn PDF document text
    • http://teren.fun/blood_type_o_positive_food_listnwchc.pdfIn PDF document text
    • https://zomafada.weebly.com/uploads/1/3/4/7/134772300/b214753332.pdfIn PDF document text
    • http://boomerangoo.site/xiwirofanatutejuxewu9598p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/endorsement_letter_format_for_inspire_fellowship.pdfIn PDF document text
    • http://lumoripaluwikiw.rf.gd/kunajina.pdfIn PDF document text
    • http://zuwukab.rf.gd/titeluki.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/chums_live_free.pdfIn PDF document text
    • http://weverikovufom.rf.gd/71337717763.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/28044450676.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/83400443595.pdfIn PDF document text
    • http://xikekopovo.rf.gd/a_little_life_audiobook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/takojipexibisarewoda.pdfIn PDF document text
    • http://zosuvupetod.epizy.com/petusifakedemegubamu.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_off0000de6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6B 5584 bytes
SHA-256: d94c2af8d746579a2c02832d531a2438d5e1c850a7ef47d31f341e4b98a33fb9
font_01_sfnt_off0000f14b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14B 9996 bytes
SHA-256: 632b844e8e3f34c61ab192509aa205ebcd70c026015be2f863c19e627bbe60e6

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