Malicious PDF — malware analysis report

Static analysis result for SHA-256 a969c2a70fc121a5…

MALICIOUS

PDF

72.1 KB Created: 2020-03-26 11:46:41 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: 40d7f7be9012653cc778a77621b006c8 SHA-1: 03ef791e3655b306692e6e7271f9311ef51ba2c2 SHA-256: a969c2a70fc121a5edaa443cce15d75600a5c5070fec1c8794e9ecfed6f1eb7d
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded URLs, indicating a link farm or SEO spamming attempt. The document body, though heavily obfuscated, contains references to URLs that are also present in the extracted URL list. The primary function appears to be directing users to a multitude of external websites, likely for malicious purposes such as distributing further malware or conducting phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 http://flatlandscivicclub.com/uploads/1/3/0/4/130435848/130435848.html#the+witcher+last+wish+quest PDF link annotation
    • http://newbeginningsinvestorsllc.com/uploads/1/3/0/3/130379294/tiluniwamadugu.pdfIn PDF document text
    • http://westakronvetclinic.com/uploads/1/3/0/5/130552097/vajofotewiwojev_webokikimaze_tewofozitazewo.pdfIn PDF document text
    • http://gatorsdocksidedeland.com/uploads/1/3/0/6/130621283/fivukofabixafu_gakuxetodej.pdfIn PDF document text
    • http://stazkoassociates.com/uploads/1/3/0/6/130604757/414949.pdfIn PDF document text
    • http://jondebenedictis.com/uploads/1/3/0/6/130605440/8283909.pdfIn PDF document text
    • http://myleadgensecretreviews.com/uploads/1/3/1/1/131163910/tedoraz.pdfIn PDF document text
    • http://ivfsupport.ca/uploads/1/3/0/4/130483993/d3593c54911.pdfIn PDF document text
    • http://www.kencking.com/uploads/1/3/0/8/130813852/5661752.pdfIn PDF document text
    • http://globalcrosslinker.com/uploads/1/3/0/2/130292098/d39e3499a1dc.pdfIn PDF document text
    • http://taraletsgo.net/uploads/1/3/0/7/130775498/3383107.pdfIn PDF document text
    • http://www.springscatholicfire.org/uploads/1/3/0/7/130738984/6380cc4b79d8.pdfIn PDF document text
    • http://thechristinaleavenworth.com/uploads/1/3/0/7/130776015/1212130.pdfIn PDF document text
    • http://keepcalmandswitchover.co.uk/uploads/1/3/0/4/130489029/3995422.pdfIn PDF document text
    • http://medicalmarijuanamiracle.com/uploads/1/3/0/5/130589189/690876.pdfIn PDF document text
    • http://chicagomarketoverview.com/uploads/1/3/0/4/130488979/mexapoloreranexi.pdfIn PDF document text
    • http://celebritydiethealth.com/uploads/1/3/0/2/130289778/9355729.pdfIn PDF document text
    • http://mta-sts.memorylanerestorationsandcollectables.com/uploads/1/3/0/9/130969690/3a56ed3108013.pdfIn PDF document text
    • http://www.whitefishmountainretreat.com/uploads/1/3/0/7/130740202/mekot.pdfIn PDF document text
    • http://www.vegaindustriesllc.com/uploads/1/3/0/3/130379462/voxomiguwifonoxox.pdfIn PDF document text
    • http://fleetdriverstraining.co.uk/uploads/1/3/0/5/130551190/mewerusepuzilebe.pdfIn PDF document text
    • http://www.furuh.com/uploads/1/3/0/9/130969702/c20cbfb6d.pdfIn PDF document text
    • http://vivere-slow-com.vincentstocklin.com/uploads/1/3/0/6/130604101/zilare.pdfIn PDF document text
    • http://www.halifaxwalkingtour.com/uploads/1/3/0/8/130874554/a17aa8.pdfIn PDF document text
    • http://nabyou.com/uploads/1/3/0/3/130379352/miwevodag_tumilafigabup_banotasowazegem.pdfIn PDF document text
    • http://www.bbailey24.com/uploads/1/3/0/5/130590777/zedakefub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://www.adobe.com/).NotoIn PDF document text
    • http://www.google.com/get/noto/http://www.adobe.com/type/ThisIn PDF document text
    • http://scripts.sil.org/OFLNotoIn PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA34F 15508 bytes
SHA-256: cdbe4c3962a3ab8634d21ec3458f16ed6f9c3eb94d36a5f8f0123d4d3a743c09
font_01_sfnt_off0000d1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E5 14276 bytes
SHA-256: bc34bb75a2eed2cc95f951fab6c3454aa328a75bd01bab6fe13e6616fb5c6a20
font_02_sfnt_off0000ff77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF77 5676 bytes
SHA-256: dc0c6fb4488b1376fcd69388492a4a0f82e7e72ea2b6247a094a69c9ce63f230