Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e0e5a0dbc8d000b…

MALICIOUS

PDF

44.2 KB Created: 2020-07-15 03:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 3ce71026502478335252c38b04f610c8 SHA-1: 18f2a9f48de77539c369e26b410798669ca580af SHA-256: 6e0e5a0dbc8d000bff31f04dbc4dc1734bf369ee0b3c9dbde3a0b32938837810
194 Risk Score

Malware Insights

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

The PDF file contains numerous links to external PDFs, many of which point to redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to an instruction manual. The ML classifier strongly indicates maliciousness, and the presence of redirector links points towards an attempt to lead the user to malicious content or phishing pages.

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://ttraff.com/wb?keyword=citroen%20c8%20instruction%20manual In PDF document text
    • http://files.thestonestash.com/uploads/1/3/0/9/130969485/3252634.pdfIn PDF document text
    • http://files.parkhillbowlingclub.com/uploads/1/3/2/8/132815154/4047543.pdfIn PDF document text
    • http://files.midlandsurgicalinstruments.com/uploads/1/3/0/7/130739073/8481977.pdfIn PDF document text
    • http://files.sarnetfl.com/uploads/1/3/1/3/131398091/lemabomusu_zeralifena_pefepip_gebojodu.pdfIn PDF document text
    • http://files.silasclifford-smith.com/uploads/1/3/2/8/132814552/5006569.pdfIn PDF document text
    • http://files.steepleclaydonschool.com/uploads/1/3/0/9/130969775/2b53fe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://vonemozovema.files.wordpress.com/2020/06/xijuruwagakewuj.pdfIn PDF document text
    • https://tulibefeza.files.wordpress.com/2020/07/40494434861.pdfIn PDF document text
    • https://nolomijavugi.files.wordpress.com/2020/06/70401802882.pdfIn PDF document text
    • https://fikuravere.files.wordpress.com/2020/07/vomitamija.pdfIn PDF document text
    • https://fafabozum.files.wordpress.com/2020/06/2914744571.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7035/7653/files/64417653995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/ginijujuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wopesutokuvikoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53681635306.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/47681298513.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/8645094528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2174/6847/files/fegukakaragupur.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70A9 5044 bytes
SHA-256: 8c7551e84f6215b775ebda45aa3b9a58629867bb2371a29f7e8483f486612cb8
font_01_sfnt_off000081af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81AF 9876 bytes
SHA-256: 69ccacb5ace4d3f5043c62fca493f5f37803ba3588aff500913c2714781d9087

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