Malicious PDF — malware analysis report

Static analysis result for SHA-256 b955c0affac5fd0b…

MALICIOUS

PDF

46.1 KB Created: 2020-10-28 10:08:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 460ef9c7bd8a5f509a51daf56db628ae SHA-1: e5a4fda5b7434ed57493e256b3f84fce4744af18 SHA-256: b955c0affac5fd0bbca2348060caa2aae1b7f34c337d394aeb319f1a1a9faadd
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a redirector service, which is a common tactic for distributing malware. The document body and embedded URLs suggest a lure to download an "apk", indicating a potential attempt to trick users into installing unwanted software. The presence of numerous PDF links further supports a link farm or redirection strategy.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=new+working+showbox+apk In PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/7146550.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/5229935.pdfIn PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/bemek.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/zatug_vemaluwava_pizibu_zizux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3609/6684/files/sch_ting_anh_lp_7_mi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2192/1177/files/hotels_near_millstone_performing_arts_center.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1329/8093/files/18027455766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71d452e4-5d21-471f-b303-7d2173992d7f/23524243924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb82d483-9187-4d4a-a260-e487cb394e76/sazaxeke.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/20826497496.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/banepesop.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/bankrupting_nature.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8715/0752/files/food_web_worksheet_high_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0319/9138/files/gutojimizodufaxaselu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1911/4952/files/legoxudedigeraf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91126c3c-6922-46fd-9ac5-e010f9eaa88a/21018654868.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63a7e7ed-affb-4e54-ac9e-485a56ccc993/tamamaxopetozenasugi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfd77025-5730-423c-8c68-fbea95021a39/81911215207.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d6b8728-8b67-4e4c-8984-d605f302ae44/38876993704.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_off0000735d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x735D 5384 bytes
SHA-256: d487d65fb09b9eb3765d7a37c192166ddf84733dfbe2f95b24465e04a26f80b7
font_01_sfnt_off000085c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85C5 11360 bytes
SHA-256: 55ae1dc7394cb5656e9a9f589f10adc62436694ce311438f8e4f92826af40864

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