Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f4aa60713331b0d…

MALICIOUS

PDF

73.5 KB Created: 2021-02-08 16:29:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: abbc3670278e65bfddc8e98e158465b3 SHA-1: 1630bab7eb73af09e49a9cb12981d153d629f088 SHA-256: 8f4aa60713331b0db2ed139f25cf0f891741e697f60dba4748ea932b126a56ba
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are dynamically generated or use numeric slugs, indicating a link farm or SEO poisoning attempt. The presence of a URL related to 'netflix di android box' suggests a lure to trick users into clicking malicious links. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

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://jacksth.ru/aws?utm_term=cara++netflix+di+android+box PDF link annotation
    • https://cdn.sqhk.co/doginifa/hdjjsj0/cruise_companies_ranked.pdfIn PDF document text
    • http://zikizitepef.iblogger.org/kegilusepuvedirimoluse.pdfIn PDF document text
    • https://zaluvunikuf.weebly.com/uploads/1/3/1/0/131070459/397202.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/agTbC2H/nipagisutivozefutomevilim.pdfIn PDF document text
    • https://damujulul.weebly.com/uploads/1/3/5/3/135335913/kogitafazulupik_mijeganafak.pdfIn PDF document text
    • https://folumenudi.weebly.com/uploads/1/3/2/6/132681426/falinotu_solusinuda_bukarujixonig_matuf.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/0hcCJmD/52406537459.pdfIn PDF document text
    • https://cdn.sqhk.co/bibilofefi/vibggha/badlands_western_movie_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/higM9Oy/defender_3_hack_apk.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
    • https://s3.amazonaws.com/gedimuta/30446005219.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/fb_lite_terbaru_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/being_frank_full_movie.pdfIn PDF document text
    • http://badunedotefewep.rf.gd/annonaceae_family_characteristics.pdfIn PDF document text
    • http://duwufinojitu.rf.gd/instagram_grid_template_app.pdfIn PDF document text
    • http://vugapadilubokis.epizy.com/converting_decimals_into_fractions_worksheet_year_6.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/78472455287.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/rijiselebulumazijoninowe.pdfIn PDF document text
    • http://betiger.epizy.com/checkpoint_4600_datasheet.pdfIn PDF document text
    • http://nokigabexotuk.rf.gd/2019_telugu_panchangam_calendar.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD656 4740 bytes
SHA-256: 4daac5c61a6706558c062ae671c6f84c1a956b56cc503d4f86dda0b53694233d
font_01_sfnt_off0000e684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE684 10664 bytes
SHA-256: aae1cfc7bb8299ef63754f0bbd2cff5205a650c475928079a92ee76cc5bbd646
font_02_sfnt_off00010ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD2 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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