Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0830bb8ba585a01…

MALICIOUS

PDF

57.5 KB Created: 2020-08-16 22:58:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7cf15f829287acc0c3c1a00412d01fc9 SHA-1: 3439ac501f7b3f2401cbc85e9d23bc89f1950f32 SHA-256: d0830bb8ba585a013382cf98666667670892e5e5e222fc15128b610ce4c5f700
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests an attempt to distribute malicious content or phish users. The primary malicious IOC is the redirector URL, which likely leads to further stages of infection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/pify?keyword=2010+camaro+v8+manual+for+sale In PDF document text
    • http://files.burrbulldogpto.com/uploads/1/3/0/8/130874305/8dc347a7fbd3670.pdfIn PDF document text
    • http://wivugena.cbcasheville.org/uploads/1/3/2/8/132814930/nogumulag-figek-wufekalutuk-visolufatipuza.pdfIn PDF document text
    • http://files.hallieselinger.com/uploads/1/3/1/4/131453054/zuzotizu-bixovalajo-fisozagas.pdfIn PDF document text
    • http://files.anythingpaperkim.com/uploads/1/3/1/6/131637125/xabuvufukapigazalev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7751/0055/files/mobaxadukez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sivezijikok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7218/2685/files/79302178108.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2402/2680/files/tusetekevilexafud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/80503019207.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3806/5308/files/tuxeripisavepinepazidel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7035/7661/files/62401445011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/astron_rs-_35a.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9875/1641/files/37739951465.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5627/5362/files/guxefajafama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9963/4330/files/rasorumaved.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4971/2806/files/nafedobalagozesenavesu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F0D 5268 bytes
SHA-256: 2883f32a5ebf234aec6489690e3136db8644cdc8d11bb21bd4998289cdaeeb9e
font_01_sfnt_off000090cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90CB 10332 bytes
SHA-256: 6cd1d6dc47953aeb99c8b0d26c25106ede8af6e3e11a7f443820cc5f5ac1e6b0
font_02_sfnt_off0000b45e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB45E 16376 bytes
SHA-256: c3d0ee408bee49a88931d2ac630a9fb52e88a46fabab5a72aa19e78bbe1d3826
font_03_sfnt_off0000ca06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA06 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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