Malicious PDF — malware analysis report

Static analysis result for SHA-256 a23f76150e61ddee…

MALICIOUS

PDF

41.1 KB Created: 2020-10-22 05:50:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 87cd85aef7bf8a593ae85047c8857ed4 SHA-1: ac0de8620be576876e4743e496ce4109dceb12ee SHA-256: a23f76150e61ddeebae87011d746c1584dafbc6df1b073115a92dd61432ba576
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/pify?keyword=super+bright+led+lantern+ls360+manual In PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/lejexafopotak_nuwevirafikuv.pdfIn PDF document text
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/momamotixuvo.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/zarutusaro.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/5893f450c.pdfIn PDF document text
    • https://kafaziwe.weebly.com/uploads/1/3/1/0/131070109/68eef8c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371806/normal_5f8927e84b7c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389384/normal_5f90f33595672.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374838/normal_5f89d67594fad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381321/normal_5f90a92e67166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_5f89fd8896e6a.pdfIn PDF document text
    • https://repugonajipivup.weebly.com/uploads/1/3/0/8/130814926/xajaxol.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/dezokisibelobujepuv.pdfIn PDF document text
    • https://xonuvalax.weebly.com/uploads/1/3/1/4/131437330/tabojudu-pusibumapabivis-furepepomam.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/3521954.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/domegagowevag/80418198.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/nopiwuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d34c6e50-1ea7-4e21-b5ee-2a362369e779/92673972786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c5bc30d-66e9-4a5c-a8b0-4fbfa4697b6a/faguwoziduvariwixamapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2974a6d7-9987-4acb-a09d-be2bfdc98814/mopipinoso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1732/9566/files/65987255634.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/2091/4335/files/wezilugumusatitularabub.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
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000535c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x535C 6076 bytes
SHA-256: 81a1aeed444e976c7e99906d6612fda4814e79bfc8c0d3f6a3645c592f4975c1
font_01_sfnt_off00006788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6788 2800 bytes
SHA-256: 1fe8b5a92c166e512656d86ad50560a9ebd38fe4dbee5671ff8f7d8424607e38
font_02_sfnt_off00007235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7235 10208 bytes
SHA-256: 0df413a4f2681f489bd2212603500612deda1fd49e0b1b5f96c3c5cc59b9fe39

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