Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eacbf555c86c336…

MALICIOUS

PDF

56.1 KB Created: 2020-11-03 15:06:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: ca32a51fd18eebd5f78310aa695674db SHA-1: 311ae713affcbf6e16e4aaf7f9ea60db69cf1680 SHA-256: 1eacbf555c86c3363be8ba8901130496f978fd1b1b9dff1ce7c8fb21324a40e2
254 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/ridigozes_gotilukivisabeb_femamozum_dupem.pdf.
  • 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/aws?keyword=happy+hack+mod+apk+download In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/ridigozes_gotilukivisabeb_femamozum_dupem.pdfIn PDF document text
    • https://latenenagizogip.weebly.com/uploads/1/3/2/6/132696064/perewa.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/furowivawumemu.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/555469.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/3319711.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000090bc.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000090bc.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0000c567.bin)
    • https://uploads.strikinglycdn.com/files/df07ac5a-03a7-4f47-a1f7-b5774a5dd086/auto_transformer_starter_rating.pdfIn PDF document text
    • https://s3.amazonaws.com/welutizenop/security_in_computing_pfleeger_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d93d7890-534d-4c8d-98d5-f34b2d7ea51f/94365079333.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e798e44-d473-4aae-beb6-8c60dbfb0d23/68521931722.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f52d4f38-796e-4bcf-bca4-4f4c270b52a6/governing_texas_champagne.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_off000090bc.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000090bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90BC 4800 bytes
SHA-256: 2b5a97aba3a6155431eb77ba741b464200b7f5919215f0f11439785cdb0d6f02
font_01_sfnt_off0000a0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0E9 10696 bytes
SHA-256: 842333f16497bc823c201eefc4c032149bae23c2842d6f9ab8448e94b022b708
font_02_sfnt_off0000c567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC567 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176