Malicious PDF — malware analysis report

Static analysis result for SHA-256 0babe1bfd5212547…

MALICIOUS

PDF

45.5 KB Created: 2020-10-03 09:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8d48dd069189750453dd39567000ba05 SHA-1: 529b980f87d4ff52ae1953292fa8db9ed2a18755 SHA-256: 0babe1bfd5212547a9ab0fac1425ccfd7ed779298250ed8d729cb5efefe0952b
274 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to a redirector service. The document body also contains the redirector URL and other links, suggesting a deliberate attempt to drive traffic to malicious or phishing sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • 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.link/pify?keyword=auto+dimming+rear+view+mirror+subaru In PDF document text
    • http://files.friendsofcarmarthenshiremuseum.co.uk/uploads/1/3/1/8/131856247/sujepiwemopofez_gexobuja_vobovor_bizozavajuwu.pdfIn PDF document text
    • http://files.recapinc.net/uploads/1/3/2/3/132303410/2945783.pdfIn PDF document text
    • http://xawozab.mccombwholesale.com/uploads/1/3/1/3/131379699/a333c4d3faeb93.pdfIn PDF document text
    • http://pubibap.essentialfocuscoaching.com/uploads/1/3/1/4/131453943/berazoxuz_daponokesun_gifijaxapizix_nopirejorigeza.pdfIn PDF document text
    • http://putavu.obsidianrenewables.com/uploads/1/3/1/1/131163774/8547438.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000734e.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000734e.bin)
    • https://cdn.shopify.com/s/files/1/0437/9269/5456/files/5807006833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4206/3004/files/kentucky_courtnet_2.0_kba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4613/6729/files/96640962650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7899/1513/files/83601858160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7509/3159/files/the_possibility_of_evil_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1172/6750/files/gajatuzofawuva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/1134/6079/files/bluetooth_gps_receiver_for_iphone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2725/7749/files/kuxivavuwazenepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5541/5445/files/2000_vw_beetle_wiring_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3594/9218/files/cosmos_flower_meaning_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0581/9555/files/nexewofusivoko.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_off0000734e.bin)

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_off0000734e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x734E 5392 bytes
SHA-256: 574a526474354379974363ac126a14cd1c09dba335f9ba1032946c62e0f64b50
font_01_sfnt_off0000859d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x859D 10340 bytes
SHA-256: 2dcb3b32a9a8659fb7939716e351c19ac29e62a6ed4501a5ddad6975a26cc568

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