Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a21c70ae7c91199…

MALICIOUS

PDF

49.4 KB Created: 2020-10-23 06:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: b4e9da453eb79be8402bf0716496c026 SHA-1: 1a49c6890a2a7b24b92e2cb8e57a7e1cb01156b0 SHA-256: 8a21c70ae7c9119937886b9be753c601f1eaeac3ca80dacffcffe1d35a605c79
194 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.
  • 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://ttraff.link/pify?keyword=neet+2020+application+form+pdf In PDF document text
    • https://lowizozexide.weebly.com/uploads/1/3/0/7/130776176/mijefiziwitudapo.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/jaxisi.pdfIn PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/lojuduzazoxi-sujigufomorufu-xoweratikak.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/denununewojijikogor.pdfIn PDF document text
    • https://gobumireg.weebly.com/uploads/1/3/1/3/131383916/952cbe9.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/36ce75ac.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/7939735.pdfIn PDF document text
    • https://pudegubazamase.weebly.com/uploads/1/3/1/1/131163945/gewupefamesuba.pdfIn PDF document text
    • https://lujetuzamuja.weebly.com/uploads/1/3/4/3/134372728/wuzukebil.pdfIn PDF document text
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/mebekeripitigezasi.pdfIn PDF document text
    • https://wopeduvolevim.weebly.com/uploads/1/3/0/7/130776212/6281626.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000072d5.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000072d5.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0000a868.bin)
    • https://s3.amazonaws.com/jimugivos/paruvisebemaweselok.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/animorphs_book_12.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/75163460214.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/agents_of_socialization_family.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/pexemezasodu.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/chicken_biryani_recipe_in_malayalam_language.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/77304811483.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/ardhanareeswaran_novel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/4531/9333/files/to_mp4_3gp_webm_video_converter_apkpure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0315/8433/files/for_and_against_essay.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/9849/8981/files/port_washington_high_school_phone_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0895/8362/files/waxodak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2773/2896/files/longs_peak_umc.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 extracted file (font_00_sfnt_off000072d5.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D5 5156 bytes
SHA-256: 46c276d7ca0873e2c046a0f175755bb2273d0cefd4a206b63799f251142185ac
font_01_sfnt_off0000843b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x843B 10616 bytes
SHA-256: 31488e4d76da25b30fecdffb6ead48f36ccdc1f9588cf3fa89e12a93d7d418cd
font_02_sfnt_off0000a868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA868 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f