Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eea0483d47098d8…

MALICIOUS

PDF

41.1 KB Created: 2020-10-26 07:55:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 4bc3be048afa267624b5851490a78257 SHA-1: a84904a951325d9ac7ef4594088c404e1ad4f321 SHA-256: 7eea0483d47098d8bdf3dda294cbb31fa79af46764ae11b02e9bb6514dc81d44
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://cctraff.ru/pify?keyword=percent+error+practice+problems+pdf In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/9276785.pdfIn PDF document text
    • https://gukepofefefika.weebly.com/uploads/1/3/1/4/131437977/donazumeta_kaxowanebubuk_likomitide.pdfIn PDF document text
    • https://zekuwatifakaxi.weebly.com/uploads/1/3/2/8/132815855/sosumigaf_fivoso.pdfIn PDF document text
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/remofesijez.pdfIn PDF document text
    • https://xomevore.weebly.com/uploads/1/3/4/3/134346529/e84a521.pdfIn PDF document text
    • https://sewiwojura.weebly.com/uploads/1/3/4/3/134371681/gokapugof-lebitafit.pdfIn PDF document text
    • https://funiwulew.weebly.com/uploads/1/3/2/8/132814073/disebonokotidamewu.pdfIn PDF document text
    • https://mogunugive.weebly.com/uploads/1/3/4/3/134381007/2191534.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376382/normal_5f9003f78bcfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369645/normal_5f8d03d0b9d93.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005e42.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005e42.bin)
    • https://cdn.shopify.com/s/files/1/0504/4640/1711/files/jedaginaxikemitim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0319/9138/files/android_one_mi_a1_themes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6557/2514/files/58246879741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3296/7318/files/lilufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2854/7237/files/fannie_mae_guidelines_on_notes_receivable_income.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9209/2102/files/nujozetejuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3251/8049/files/23410953229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2556/2269/files/vixezubeje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6631/7205/files/hack_for_madden_mobile_16_promos.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_off00005e42.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E42 5444 bytes
SHA-256: 4bdd5d99d39c7b45fc78679d6b3a2a2efa13cbb8d46b8d4be9824f65ae5f7b74
font_01_sfnt_off00007093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7093 11296 bytes
SHA-256: 49b13538455b6fa27648acf1a0cf5643700c6a7f52b06be5c2eb93b485ff5651