Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c3ec420ae2e7943…

MALICIOUS

PDF

41.0 KB Created: 2020-08-05 01:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd49080bc23b50f2b64e00e6bec84c73 SHA-1: e7626624ba916a929dbe77b00a55bfcfe23f21b4 SHA-256: 3c3ec420ae2e794349c322af530dff5a73be53e11d1db48be589478f3b2c7f6c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the title 'Shariat ya jahalat pdf book' and the malicious URL, suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the PDF structure and embedded links are indicative of a phishing or redirection attempt.

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/wb?keyword=shariat%20ya%20jahalat%20pdf%20book
    • http://files.anelisacalmet.com/uploads/1/3/1/3/131383284/jaxevaw.pdf
    • http://files.thienphuoccharity.com/uploads/1/3/1/8/131857115/gatozogemufumif.pdf
    • http://files.goodtherapysandiego.com/uploads/1/3/2/7/132741348/05b0206f9b365a3.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/80341077433.pdf
    • https://cdn.shopify.com/s/files/1/0432/9370/4350/files/95717521879.pdf
    • https://cdn.shopify.com/s/files/1/0431/1964/0738/files/riwamawekoputomemenakepep.pdf
    • https://cdn.shopify.com/s/files/1/0431/5139/2922/files/zarabujinovemojuzugisakiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5712/7336/files/vamore.pdf
    • https://cdn.shopify.com/s/files/1/0437/5799/4138/files/zikugedibizobuta.pdf
    • https://cdn.shopify.com/s/files/1/0429/5370/3590/files/xamotajisinisaradobum.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/82196483167.pdf
    • https://cdn.shopify.com/s/files/1/0434/3929/2577/files/19996092112.pdf
    • https://cdn.shopify.com/s/files/1/0436/6182/0054/files/90016115163.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7006/files/destiny_vault_of_glass_armor.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b99.bin
84ebf9435721c0d1d005c64c89a862273d6095897854fd2ab5a6e42d3bb48657
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B99 5000 bytes
font_01_sfnt_off00005ca7.bin
e916804ee7115fc281cd765b82b81801e564b14898ae142758e590b414fb46d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA7 13512 bytes
font_02_sfnt_off00008782.bin
ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8782 4324 bytes