Malicious PDF — malware analysis report

Static analysis result for SHA-256 1acdfb900604ead0…

MALICIOUS

PDF

43.3 KB Created: 2020-10-25 18:23:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 8022bc83c2e6a7f17bacf2da3726fbb2 SHA-1: f1e83d506a7d08e346de0eb01a00cb69cbf25b70 SHA-256: 1acdfb900604ead017b2a4d7c6954ffc25e3333ba7ffe6250bdc68843ba210f5
202 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.
  • 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://cctraff.ru/pify?keyword=wifi+panorama+camera+apk In PDF document text
    • https://kulilopoxi.weebly.com/uploads/1/3/4/3/134375859/kevogovenamif_ninovixafafogu_gekatozolowa_kudolobu.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/a2089410.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_5f941730089b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370560/normal_5f892fffad571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383565/normal_5f8f67ce04b82.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000687b.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000687b.bin)
    • https://s3.amazonaws.com/vexeliku/linux_boot_process_in_detail.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/bugoxugapuretu.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/self_defense_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/spanish_bilingual_dictionary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6759/5165/files/zukevozame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3568/6560/files/98440285789.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8965/2648/files/leyes_laborales_de_puerto_rico_renuncia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7704/5924/files/sony_dream_machine_fm_am_clock_radio_icf-c218_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/food_list_for_diabetics.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/rudejukisolekesejaravalum.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/66228163031.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/isometric_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/angels_of_death_40k.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbffa2d1-a7e0-4e39-9584-ea1befdea757/google_doubleclick_for_publishers_sm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e884732a-8aa4-4b3f-bbce-41234c728511/69409137779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7c5c9ff-d2d2-4711-9758-a6b8783d49a7/as_institutas_volume_3.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_off0000687b.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000687b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x687B 5028 bytes
SHA-256: c68a523c8de75b71afda429373ec3638f467648fa1abdd2e60933b0e11c90b55
font_01_sfnt_off0000798e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x798E 11560 bytes
SHA-256: 35090c77bc40aa854d721c2cd89bc6003927d0bbc61e9f49deffc270abbb368a