Malicious PDF — malware analysis report

Static analysis result for SHA-256 49778e8e6ec6bc37…

MALICIOUS

PDF

76.5 KB Created: 2021-03-15 18:54:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5f4a27e6c45b869d4bf2da6e3e5ad974 SHA-1: cc8e0ab6f71b3ec51ee55fd638449182f9dbd93e SHA-256: 49778e8e6ec6bc37b2b8aae77020527f7fb370d3527ec808b5ba1c725879f8b4
126 Risk Score

Malware Insights

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

The PDF file, disguised as a guide for lighting a gas fireplace, contains numerous embedded links pointing to disposable hosting domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure and embedded URLs are indicative of a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://bologen.ru/wb?keyword=how%20to%20light%20a%20majestic%20gas%20fireplace%20pilot PDF link annotation
    • http://mesikigodijope.mypressonline.com/tosuwowokugekirativ.pdfIn PDF document text
    • http://dakisemakegag.sportsontheweb.net/54183507420.pdfIn PDF document text
    • http://lezeninimi.medianewsonline.com/courageous_leadership.pdfIn PDF document text
    • http://kogutojoveso.mywebcommunity.org/english_alphabets_in_different_styles.pdfIn PDF document text
    • http://vexoxem.scienceontheweb.net/organometallic_catalysis.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/df4b9cc2-9c38-4a04-8ebf-9f4e0fb47716/98925044041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb597ba7-9dfd-4cfb-a207-d554b6bf1c30/53345884548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7526447-9937-4215-a492-77778ce33054/star_trek_discovery_episode_8_season_3.pdfIn PDF document text
    • http://bekusisit.atwebpages.com/california_cooperage_hot_tub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/433b0288-48e7-4708-8987-b65f162507bf/lecture_on_nothing_1961.pdfIn PDF document text
    • http://jipaxesu.rf.gd/don_best_injury_report_wnba.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/driver_mini_laptop_acer_aspire_one_zg5_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/american_beauty_sheet_music.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/qam_modulation_matlab_code.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/cadre_photo_pas_cher_grand_format.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/68582276552.pdfIn PDF document text
    • http://sefogubijisep.epizy.com/nujusax.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/grey_brushed_cotton_fitted_sheet_king_size.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/chef_de_partie_cv_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/21758013750.pdfIn PDF document text
    • http://sijaxulo.rf.gd/sodium_bisulfite_formic_acid.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/10_inch_android_tablet_reviews_2019.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_off0000eda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA2 5560 bytes
SHA-256: 8834702b1df64d96e436bf68553b56bef63aef3c7fa1329b896651cadcc19fda
font_01_sfnt_off0001007b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007B 10492 bytes
SHA-256: 1d007d16e11767a260c0dd62867575c3522e66b3c3c61ad8be606e28c7bb29aa

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