Malicious PDF — malware analysis report

Static analysis result for SHA-256 357d16e3f9d55507…

MALICIOUS

PDF

47.7 KB Created: 2020-10-26 23:46:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: a2bfc15e9985cfac542a848e2bf99b44 SHA-1: 94b8bcc9deea43fed8b21ebb15d522c25c558572 SHA-256: 357d16e3f9d5550702c4b86084f6a8703983d49ce0cb228d8194f8eee420bd20
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/strik?keyword=viking+tunic+dress+pattern In PDF document text
    • https://silemixijotin.weebly.com/uploads/1/3/4/4/134463531/rexaterixol.pdfIn PDF document text
    • https://gogekelonirivi.weebly.com/uploads/1/3/4/4/134438841/kugutojafuzigegu.pdfIn PDF document text
    • https://vebifejelib.weebly.com/uploads/1/3/0/7/130775119/42183.pdfIn PDF document text
    • https://paduxadoduxim.weebly.com/uploads/1/3/0/7/130775016/mogepizipiporukam.pdfIn PDF document text
    • https://rajomiluti.weebly.com/uploads/1/3/2/6/132682989/fobijezex-fupixugeda-rukub-kalajodez.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007b3b.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007b3b.bin)
    • https://cdn.shopify.com/s/files/1/0430/8523/4338/files/semokebov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4528/2214/files/growing_up_creepie_raven.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9690/2294/files/lidalonoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2941/2040/files/international_ministers_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/8309/3910/files/vodefugar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4540/2277/files/kinich_ahau_pronunciation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1500/4582/files/sift_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7277/4832/files/psiphon_pro_premium_apk_cracked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb43eeb0-5065-4a0c-bd7c-c367c6777828/kefugutediduzerev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/542717da-2fd0-4487-8a77-3bafd4e94b7a/8089887720.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd1d5a08-2357-4bf1-8171-1f9d294aeda0/florida_bdi_course_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6041d6ed-939a-46a5-8bbf-e2d904278df1/51968295212.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/624ca145-fb28-4e0e-b23d-bb50641e4e9c/11292234148.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/astrology_books_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/vukumimolepe.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/my_dream_house_paragraph.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_off00007b3b.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3B 5240 bytes
SHA-256: 4b73a10e3e89cd17b272fb7c5fc3d657b26f253311bdaa067998cde82ed156f2
font_01_sfnt_off00008d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D1C 10704 bytes
SHA-256: bcb8c0a29fbbbe2bc35d971957a118ccbc6963bfb41678422e96a3576e040115