Malicious PDF — malware analysis report

Static analysis result for SHA-256 79363abeec1fc8a4…

MALICIOUS

PDF

55.7 KB Created: 2020-10-28 05:24:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: debc99463db6870bf0fe3b33df2e0403 SHA-1: 0facaa6b6f6aead5e354b8ff7a3aeea1d031a85d SHA-256: 79363abeec1fc8a48ad5826947b3b563cc532109be28260ce5ef4d729dfd6297
214 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://ttraff.me/123?keyword=light+waves+and+matter+answer+key In PDF document text
    • https://risimukino.weebly.com/uploads/1/3/1/3/131383953/kugafuwagusulovono.pdfIn PDF document text
    • https://zusaneji.weebly.com/uploads/1/3/0/8/130813769/545980.pdfIn PDF document text
    • https://pesajupamobe.weebly.com/uploads/1/3/1/6/131607203/bupiretefonudijak.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/pusota.pdfIn PDF document text
    • https://kapekutom.weebly.com/uploads/1/3/4/4/134437999/1027094.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/funav.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/kegevegizufifim.pdfIn PDF document text
    • https://tevirilozarenov.weebly.com/uploads/1/3/2/6/132695732/dijomiwokoxej.pdfIn PDF document text
    • https://rukinedofixod.weebly.com/uploads/1/3/4/3/134348838/d4bbe.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/lebaxa/first_home_buyers_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/13532444985.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/parliamentary_sovereignty.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/77123474835.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/negative_prefixes_list.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/sasajite.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/16083443028.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/15772877906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/674a95a0-6ade-4c2a-9ba4-0492722956c7/solumulupemopitusiwumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9295592-277a-44de-8fa6-1fa300446127/28691464621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3547c998-6642-4a7f-97d8-770a9f517e8c/23263694790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c630a2d1-45cf-47a9-9358-1a3e8c687d6c/3714544470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a2fd737-8a5f-4ac0-b0dc-06a0277eb2f7/gegepawonoxabajovaxeseboz.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/warhammer_fantasy_bretonnia.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/jopofimubuxuxeli.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_off0000983b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x983B 5464 bytes
SHA-256: bad4894ce67b98d8951b1836322d6e18465df5d12ad5a8c857bea70175b149c2
font_01_sfnt_off0000aac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAC2 11436 bytes
SHA-256: f73d054772b8b1c2f767dae97222725832afa6c6082997d3c784d56106e33348