Malicious PDF — malware analysis report

Static analysis result for SHA-256 b78cd1a8ad9f4ba3…

MALICIOUS

PDF

131.7 KB Created: 2021-03-24 10:12:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9cbee9dd4931c843c9efa1374f61e8c9 SHA-1: cb83644b08ac624e3b16165a357bb7b4eff2c07d SHA-256: b78cd1a8ad9f4ba3eaaa1c41a0a4444389015487042296779a49d8a33795d7b7
144 Risk Score

Malware Insights

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

The PDF file contains a high-severity heuristic indicating it is a phishing lure, redirecting users to an external URL. The ML classifier also strongly flagged this PDF as malicious. The embedded URL, https://zajinet.ru/strik?utm_term=me+before+you+netflix+nz, is the primary indicator of malicious intent, likely serving as a landing page for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://zajinet.ru/strik?utm_term=me+before+you+netflix+nz PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416132/normal_5ff5f2f49c9b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386363/normal_601d6fa3afc06.pdfIn PDF document text
    • https://cdn.sqhk.co/berazanoga/e3eiaia/autocad_mep_2015_keygen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369317/normal_60080acd94222.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453335/normal_605879731c38c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404124/normal_604e2b4d71312.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/gdpXhax/cookie_crush_3_free_online.pdfIn PDF document text
    • https://cdn.sqhk.co/pasezateda/dbkJzN3/12802956210.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408993/normal_60221cc067a71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500183/normal_5ff0c43303ad1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469101/normal_5fec8d88dc8a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459162/normal_5ff9c10311d66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483388/normal_5fc895966a16b.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/iiAxhhc/taxumu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4b756cc-491a-4a97-a9f9-5693991ab538/twilight_breaking_dawn_part_2_final_scene.pdfIn PDF document text
    • https://a2fe464c-28d1-4db8-bb2d-552ad9bc2f4d.filesusr.com/ugd/941bb1_92de300c629f4e169393dbff136043af.pdf?index=trueIn PDF document text
    • https://60b161a2-b511-46bc-b48c-7ca4331f2db3.filesusr.com/ugd/34b71b_d0a6f00d1c124719aba1608eb74a9b45.pdf?index=trueIn PDF document text
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_7bb4b5164b90432d9e5f296213cf8fa0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac7136ba-fbe1-4a0c-b0bc-1d3f8a9c1d84/high_protein_vegetarian_foods_in_india_hindi.pdfIn PDF document text
    • https://ef4b221f-cfb4-47e8-bf1d-3b5092770df7.filesusr.com/ugd/4948da_08b85aaa1daf432097d9c194e2bdd8a6.pdf?index=trueIn PDF document text
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_15875425118e4454ac1a9e86b20dba72.pdf?index=trueIn PDF document text
    • https://71a0d42b-91d5-4e94-9338-ff69ca8a624b.filesusr.com/ugd/e5d5e5_e90a42af73a54f80a7aca3ada80848a6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8773399-c23c-4885-826a-963a17d0cfb9/fagugij.pdfIn PDF document text
    • https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_ebbd330348bd4766a587c6b949c37a91.pdf?index=trueIn PDF document text
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_8a5a622244cd4861bc35c1b7dc4a9d81.pdf?index=trueIn 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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001adbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ADBD 4736 bytes
SHA-256: bf773469fb793ca437cee8a2748f180acca0465f910d51e3edbe17eb0669e49d
font_01_sfnt_off0001bdfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BDFD 7632 bytes
SHA-256: 613111e1611c527073856eaffc8cb68b7b790dc5a0b6b939367194f25c97467c
font_02_sfnt_off0001d2d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D2D1 14520 bytes
SHA-256: 91aa8ade3d997b5028c80602b4e5ea760b0a7c0e58dd25d54411e00e41a8ce84