Malicious PDF — malware analysis report

Static analysis result for SHA-256 f181328aeef93d0a…

MALICIOUS

PDF

44.7 KB Created: 2020-11-05 00:33:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: fb456dd6d54bd4146f0344323c0126c8 SHA-1: 5aff483f6f28c871c466730125ebf5b7ac7baad6 SHA-256: f181328aeef93d0a8ce86296ab3f3ca5eb31fa2c834e90203bee3a55f4b2e586
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.
  • 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://cctraff.ru/aws?keyword=starcraft+ii+strategy+guide In PDF document text
    • https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/3533387.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368226/normal_5f883c40e056a.pdfIn PDF document text
    • https://bipinutafo.weebly.com/uploads/1/3/4/3/134358532/ruwadenabilezavize.pdfIn PDF document text
    • https://pezitojuxesuvog.weebly.com/uploads/1/3/4/6/134608136/patir-rivefevoroxajuv-bojenop-ralisogejusaj.pdfIn PDF document text
    • https://gurigibafex.weebly.com/uploads/1/3/0/7/130739571/kujilolorakuw.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/4331348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f878177065aa.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/e1fc7a88-cd64-480d-b4c2-7f54587d24ea/vixegaloza.pdfIn PDF document text
    • https://s3.amazonaws.com/nazezawovi/example_of_nhd_annotated_bibliography.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/the_crucible_movie_questions_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/vizio_vx_37_l.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/first_home_buyers_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/wuzefaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/51808008194.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7005483d-02fd-4d3e-afa6-10f8124f163e/garepuwekugoluraxavosore.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/4796710694.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_off0000711d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x711D 5364 bytes
SHA-256: cb6a7edb2dbdf58a4f40d23b6f405b8af8f5b757dd827f3b3154452560571318
font_01_sfnt_off0000836e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x836E 10044 bytes
SHA-256: 982a3e13e2b46e43ae2094e399e82a28440f2f5fde3a67ac88bc70e153fc5999