Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e4987a4b42ae084…

MALICIOUS

PDF

45.0 KB Created: 2020-10-28 20:47:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5b4b90a5a9c5dbd50e3ec665ce232e9c SHA-1: 5c92efae7bb8ed535bb1c1ff45b17bfc596ccd86 SHA-256: 3e4987a4b42ae08461344957ceb82c75353671ea840f8921f952abfa17781d9a
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to known malicious redirectors or link farms designed to obscure the final destination. The document body, though heavily obfuscated, contains references to 'Dishonored 2 guide pdf' and the malicious URL https://cctraff.ru/strik?keyword=dishonored+2+guide+pdf, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly supports the malicious verdict.

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://cctraff.ru/strik?keyword=dishonored+2+guide+pdf In PDF document text
    • https://botubadixebom.weebly.com/uploads/1/3/1/4/131407995/lonafoxudu_todiw_lowife_supesobenisi.pdfIn PDF document text
    • https://nujamoxe.weebly.com/uploads/1/3/4/2/134234607/wosugulubaro.pdfIn PDF document text
    • https://kizekusoviwo.weebly.com/uploads/1/3/1/4/131453028/a98506bcb909a.pdfIn PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/jusuwuxupekabo.pdfIn PDF document text
    • https://majijajivetik.weebly.com/uploads/1/3/4/2/134265766/fafexituf_febutonuku.pdfIn PDF document text
    • https://puwevifu.weebly.com/uploads/1/3/4/4/134465284/3a92919049ec.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/35812.pdfIn PDF document text
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/4b8c57f23e76d7d.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/1/0431/5850/3573/files/jenojujezibodifa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42ff4425-e8a3-4a9b-b302-5b53db71c233/73632965354.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/3398/6725/files/formal_letter_writing_rules.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3283/6768/files/jalujelozukumeposafi.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/how_do_cannonball_jellyfish_reproduce.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6332/7933/files/soul_eater_scythe_amazon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3876/1109/files/lupisidezomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1882/9991/files/sleep_timer_android_github.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c22ec11c-d128-4a4e-9a7c-565c78fe6c61/22972915015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9690/6174/files/11787679458.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4082/3706/files/58454696309.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/balanza_de_pesos_muertos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9392/7111/files/pelaraxeluwevasuxusavakix.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_off00007094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7094 5192 bytes
SHA-256: 06ed78cb6953500d163eb1724b7be459b8432ba4470044961ca076d85eb7e652
font_01_sfnt_off00008243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8243 10784 bytes
SHA-256: 869ff35210afa98982b5c183044c56fe30833917f5cff54ecba776232fa8c87c

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