Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0542cefb1313748…

MALICIOUS

PDF

72.0 KB Created: 2021-03-04 12:24:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8707ef40e4e67d83973b1a96f063d6dc SHA-1: d51781a94aa2e8d0d9f6482b441c2acadb346523 SHA-256: d0542cefb1313748636eb6692782c771a10676788e5e9436688ad5645d418ef4
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are disguised as search results. The heuristic PDF_SEO_LINK_FARM indicates a mass external link farm, and the ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL `https://midufefew.ru/award?keyword=how+to+plant+potatoes+in+my+garden` is likely used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://midufefew.ru/award?keyword=how+to+plant+potatoes+in+my+garden PDF link annotation
    • https://cdn.sqhk.co/kudozaporuro/8gjgdnn/child_care_assistance_texas_income_guidelines.pdfIn PDF document text
    • https://lasogevedona.weebly.com/uploads/1/3/1/3/131398076/56c606.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/1xVd4m6/zeus_symbol_oak.pdfIn PDF document text
    • https://kuxifegofemiza.weebly.com/uploads/1/3/4/8/134865321/1834352.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/59038203670.pdfIn PDF document text
    • https://sivisobimiji.weebly.com/uploads/1/3/4/7/134754783/jusujejemev.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/kenmore_he2_plus_front_load_washer_repair_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/vegedusovo/DjjUqoE/bubble_bird_3_apk_mod.pdfIn PDF document text
    • http://bukupiduge.mypressonline.com/how_to_self_clean_whirlpool_gold_oven.pdfIn PDF document text
    • https://cdn.sqhk.co/xarobumevux/Lhfjaih/red_ball_adventure_game.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/b6OSijC/fomiverosafizazugamiwedej.pdfIn PDF document text
    • https://vejevidumuruje.weebly.com/uploads/1/3/5/3/135302175/wivonelifedajub-xofuwulo-xudijosov.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/fadobirak/batman_2008_movie_in_tamil.pdfIn PDF document text
    • http://pivimufe.atwebpages.com/18094830271.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/hudson_adventure_island_4_nes.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/89226561881.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/82313808223.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/60862127042.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/fuvulivige.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/bike_race_apk_mod_free.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_off0000dcce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCE 5436 bytes
SHA-256: 2b9bc50c22e876c069d802e512a33b89f64a6b2744669618f91873f8594e9e32
font_01_sfnt_off0000ef46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF46 10340 bytes
SHA-256: 6d3fda04eb3c4b4bcd700704b4bff8a00c7a0ddc1a64ad7e47f323975305c2c3

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