PDF malware analysis — malicious · 7ccfec79969c5128

MALICIOUS

PDF

85.2 KB Created: 2021-02-07 19:48:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27

MD5: b9db93e5c41ec0ea2112deec3ed51e16 SHA-1: d10d26f20ae92583a66b4fa03719503dfc293197 SHA-256: 7ccfec79969c51282ed31976d322a43417c0a9ec003032b1d51885647857e21a

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to files hosted on S3 buckets and other domains, suggesting a link farm or a distribution point for malicious content. The presence of a 'download button' heuristic and the ML classifier's high confidence score further support malicious intent. The primary URL, 'https://baarspo.ru/aws?utm_term=adobe+reader+terbaru+full+version+gratis', indicates a lure for downloading software, likely a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://baarspo.ru/aws?utm_term=adobe+reader+terbaru+full+version+gratis PDF link annotation
- https://cdn.sqhk.co/goluxewimabu/3hjKijY/paypal_customer_service_telephone_number_uk.pdfIn PDF document text
- https://cdn.sqhk.co/dimumaneda/UpKs83m/bojif.pdfIn PDF document text
- https://voromelub.weebly.com/uploads/1/3/4/8/134872571/nosajozivaxona-gitoxugok-ridilufof.pdfIn PDF document text
- https://zapineri.weebly.com/uploads/1/3/4/7/134707132/rewajanimowumibe.pdfIn PDF document text
- https://cdn.sqhk.co/rularijulen/ieieThb/75477172990.pdfIn PDF document text
- https://cdn.sqhk.co/remimidotomi/bn7hGgc/dizegobevaniraxajuza.pdfIn PDF document text
- https://cdn.sqhk.co/gidurekigov/w6jbgh8/idle_rabbits_save_the_world_code.pdfIn PDF document text
- https://cdn.sqhk.co/vaxarogajib/N1liiVT/78438879006.pdfIn PDF document text
- https://xijiweba.weebly.com/uploads/1/3/5/3/135387982/4639223.pdfIn PDF document text
- https://fomemifeju.weebly.com/uploads/1/3/4/7/134769467/buwowevuwetebirelo.pdfIn PDF document text
- https://bonadamoge.weebly.com/uploads/1/3/4/0/134000068/e3ebbf1.pdfIn PDF document text
- https://cdn.sqhk.co/punenekebi/dl5ie1v/clash_of_clans_download_windows_7_64_bit.pdfIn PDF document text
- https://guduzuzej.weebly.com/uploads/1/3/1/6/131606672/7358287.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/dopugaxelelema/96021971302.pdfIn PDF document text
- https://s3.amazonaws.com/bomifabipi/bosch_wiper_blades_uk_fit_guide.pdfIn PDF document text
- https://s3.amazonaws.com/donarepemi/dawixepedaxutuziz.pdfIn PDF document text
- https://s3.amazonaws.com/pazerogasarinu/android_air_view_app.pdfIn PDF document text
- https://s3.amazonaws.com/wifiduxezo/ajit_singh_all_songs_free.pdfIn PDF document text
- https://s3.amazonaws.com/wizidimawag/tagudimuluwazokimukewa.pdfIn PDF document text
- https://s3.amazonaws.com/remeranexe/38365317543.pdfIn PDF document text
- https://s3.amazonaws.com/dojivewobasuval/kemusudeluduvoko.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ed31.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED31	5264 bytes
SHA-256: `72f730b194b1b811f8bd5cd5a8e1963816da7cc4ff41e8db04fcfec2d631a58b`
`font_01_sfnt_off0000ff28.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF28	2960 bytes
SHA-256: `7e81bee5c69b0c6e72ac48b608723c7821e2b824e5707c7f40e27aeb2f82644f`
`font_02_sfnt_off00010a85.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A85	10824 bytes
SHA-256: `2da335e116b68e049a668c7df79bd0f55167d2b9c5e963badabbc59b523c0919`
`font_03_sfnt_off00012f5b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12F5B	16708 bytes
SHA-256: `370e49685ae8d3da64d3d3f15fa2f8e5b179eaa17b85d271fa709f04a2f7c812`

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