Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc0b081344092a35…

MALICIOUS

PDF

40.4 KB Created: 2020-08-25 00:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0dc43153d38c1e99e781b2cb8fd972af SHA-1: a6ed7f21b1658dc6877f7b587f59e9729d8b1caf SHA-256: fc0b081344092a353bec9c8e0ef3e9f5d4db6297e7f684a263e3f9da0cd44037
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links, one of which is a known malicious redirector. The document body text, though heavily obfuscated, contains the string 'Sage 300 journal entry report' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be a phishing lure leading to a malicious redirector.

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.cc/pify?keyword=sage+300+journal+entry+report
    • http://files.olliefabracing.com/uploads/1/3/1/0/131070009/nanipeke.pdf
    • http://files.1eliteplan.com/uploads/1/3/1/3/131379730/lizez-sixoje-laxixuva-konipogogifisa.pdf
    • http://files.reclaimyourstrengthpt.com/uploads/1/3/2/6/132682070/2042848.pdf
    • http://files.carolinebrogan.com/uploads/1/3/1/1/131163838/xefuwuxifesijosubutu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/voxidej.pdf
    • https://cdn.shopify.com/s/files/1/0429/7408/5279/files/85448037801.pdf
    • https://cdn.shopify.com/s/files/1/0438/0209/9873/files/79061837805.pdf
    • https://cdn.shopify.com/s/files/1/0432/4517/4939/files/kudaxugav.pdf
    • https://cdn.shopify.com/s/files/1/0437/3646/5559/files/integrated_multi_trophic_aquaculture.pdf
    • https://cdn.shopify.com/s/files/1/0435/3395/9327/files/livros_augusto_cury_gesto_da_emoo.pdf
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/sharp_aquos_tv_remote_android.pdf
    • https://cdn.shopify.com/s/files/1/0434/5049/9222/files/pajirivipakubuzikofepet.pdf
    • https://cdn.shopify.com/s/files/1/0433/9964/3286/files/amelie_nothomb_espaol.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ea6.bin
8f489c837de5a60a01c69b0cf8e37b20d3a7d4347760cd54be77aed4dc833345
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA6 5396 bytes
font_01_sfnt_off00007116.bin
f6747130ecb619344fdbc47f8ddb696b9b94699133ab1ea64d333f09d0d0c0f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7116 10548 bytes