Malicious PDF — malware analysis report

Static analysis result for SHA-256 189a21bc89d84f24…

MALICIOUS

PDF

52.0 KB Created: 2020-10-30 15:33:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70c09adc67dbf43d2a5eafe5b90ddcbb SHA-1: 7b819f6dde0fbbc345fdc087ddbaa2f5c2bac132 SHA-256: 189a21bc89d84f24d1dce4c0cb574c39cf4734543d2901b11e27b768f43f2541
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body and embedded links suggest a lure to external content, likely for malicious purposes such as phishing or malware distribution.

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.
  • 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.
  • 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/strik?keyword=ff14+carpenter+quests
    • https://fijefozumomaba.weebly.com/uploads/1/3/4/4/134491855/5928531.pdf
    • https://jutivodip.weebly.com/uploads/1/3/4/4/134489611/fusoxegulumoro.pdf
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/3bf4e4158c1d9c2.pdf
    • https://lokixesope.weebly.com/uploads/1/3/1/6/131607163/bimebepaj-gulusulevin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/saziwijaxodav/votutipivanipe.pdf
    • https://uploads.strikinglycdn.com/files/e6cd0cde-60f6-44ca-8097-b8aea3593d0e/56738285901.pdf
    • https://s3.amazonaws.com/fedufiporara/golf_clash_club_stats_google_doc.pdf
    • https://s3.amazonaws.com/tadovu/pure_and_applied_additional_mathematics_sixth_edition.pdf
    • https://cdn.shopify.com/s/files/1/0476/9228/4070/files/pexofodagomema.pdf
    • https://s3.amazonaws.com/tumasun/mk_naomi_bag.pdf
    • https://cdn.shopify.com/s/files/1/0479/6556/9180/files/rikikij.pdf
    • https://uploads.strikinglycdn.com/files/a5bc8f0f-75a0-46ca-a3a4-3a1185473f78/gesebimajinetop.pdf
    • https://cdn.shopify.com/s/files/1/0441/3816/8472/files/25402846737.pdf
    • https://s3.amazonaws.com/gupawupigawono/futotuj.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e89.bin
70f403649bdbc1415762b2a25a81867da1047a0ec66720cd3d510f5e706d1be5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E89 4924 bytes
font_01_sfnt_off00008f59.bin
dee0485c997fd433ff3e5c5cb516b3732704bdda6c86c45a8cae0893b88c1d36
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F59 11100 bytes
font_02_sfnt_off0000b521.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xB521 4324 bytes